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var(--m3-ease-smooth)}.math-kb-tab.is-active{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.math-kb-keys{display:flex;flex-wrap:wrap;gap:6px}.math-kb-key{position:relative;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;gap:4px;min-width:46px;height:36px;padding:0 11px;border-radius:var(--m3-radius-sm);border:none;background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-family:var(--font-mono);font-size:.85rem;font-weight:550;cursor:pointer;user-select:none;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth),color var(--m3-dur-fast) var(--m3-ease-smooth),transform var(--m3-dur-short) var(--m3-ease-spring),border-radius var(--m3-dur-short) var(--m3-ease-standard)}.math-kb-key:hover{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.math-kb-key:active{transform:scale(.95);border-radius:12px}.math-kb-key.is-action{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.modal-backdrop-layer{position:fixed;inset:0;z-index:9000;display:flex;align-items:center;justify-content:center;padding:12px;background:#00000070;backdrop-filter:blur(4px);overflow:hidden}dialog.modal-dialog{padding:0;border:none;border-radius:var(--m3-radius-xl);background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface);box-shadow:var(--m3-elevation-modal);width:min(var(--modal-w, 540px),calc(100vw - 24px));max-width:calc(100vw - 24px);margin:auto;overflow:hidden}dialog.modal-dialog.modal-dialog-portal{position:relative;inset:auto;margin:0;z-index:1;display:block}dialog.modal-dialog::backdrop{background:#00000070;backdrop-filter:blur(4px)}.modal-panel{display:flex;flex-direction:column;max-height:90vh}.modal-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:20px 24px 14px}.modal-title{display:inline-flex;align-items:center;gap:9px;font-size:1.15rem;font-weight:700;margin:0;min-width:0;overflow-wrap:break-word;color:var(--md-sys-color-on-surface)}.modal-close-btn{width:36px;height:36px;padding:0;flex-shrink:0}.modal-body{max-height:74vh;overflow-y:auto;overflow-x:hidden;padding:6px 24px 20px;font-size:.95rem;line-height:1.75}.modal-body:focus,.modal-body:focus-visible{outline:none}.modal-confirm-msg{margin:0;color:var(--md-sys-color-on-surface-variant);font-size:.96rem}.modal-footer{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:10px;padding:14px 24px 20px}.kp-modal-wrap,.card-modal-wrap{display:flex;flex-direction:column;gap:12px}.kp-modal-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding-bottom:12px;border-bottom:1px solid var(--md-sys-color-outline-variant)}.kp-modal-meta-info,.kp-modal-toolbar,.kp-modal-marks{display:inline-flex;align-items:center;gap:6px;flex-wrap:wrap}.kp-modal-sec{margin:0;padding:15px 18px}.kp-modal-exp{background:color-mix(in srgb,var(--m3-color-info-container) 45%,var(--md-sys-color-surface-container-low))}.kp-modal-exp .callout-title{color:var(--m3-color-info)}.kp-modal-sec-head{justify-content:space-between;flex-wrap:wrap}.kp-modal-rich{line-height:1.8;color:var(--md-sys-color-on-surface);overflow-x:auto;overflow-wrap:break-word}.kp-modal-list{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px}.kp-modal-examples{display:flex;flex-direction:column;gap:10px}.kp-modal-ex-item{border-radius:var(--m3-radius-md);padding:13px 15px;background:var(--md-sys-color-surface-container)}.kp-modal-ex-q{margin-bottom:8px;overflow-x:auto}.kp-modal-ex-ans{display:none;margin-top:10px;padding-top:10px;border-top:1px dashed var(--md-sys-color-outline-variant);line-height:1.8;overflow-x:auto}.kp-modal-ex-ans.is-open{display:block}.kp-modal-rels{display:flex;flex-direction:column;gap:10px;padding:14px 16px;border-radius:var(--m3-radius-lg);background:var(--md-sys-color-surface-container)}.kp-modal-rel-group{display:flex;align-items:flex-start;gap:8px;flex-wrap:wrap}.kp-modal-rel-label{display:inline-flex;align-items:center;gap:4px;font-size:var(--fs-12);font-weight:600;color:var(--md-sys-color-on-surface-variant);padding-top:5px;white-space:nowrap}.kp-modal-chips{display:flex;align-items:center;gap:6px;flex-wrap:wrap;flex:1;min-width:180px}.kp-modal-chip{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border-radius:var(--m3-radius-full);border:none;background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-size:var(--fs-12);font-weight:550;cursor:pointer;text-align:left;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth),color var(--m3-dur-fast) var(--m3-ease-smooth)}.kp-modal-chip:hover{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.card-modal-box{border-radius:var(--m3-radius-lg);padding:16px 18px;background:var(--md-sys-color-surface-container)}.card-modal-box.is-back{background:color-mix(in srgb,var(--md-sys-color-primary-container) 36%,var(--md-sys-color-surface-container))}.card-modal-label{display:inline-flex;align-items:center;gap:5px;font-size:var(--fs-13);font-weight:700;color:var(--md-sys-color-on-surface-variant);margin-bottom:6px}.card-modal-box.is-back .card-modal-label{color:var(--md-sys-color-primary)}#toast-root{position:fixed;inset:20px auto auto 50%;transform:translate(-50%);z-index:100000;display:flex;flex-direction:column;align-items:center;gap:8px;width:max-content;max-width:calc(100vw - 24px);height:auto;margin:0;padding:0;border:0;outline:none;background:transparent;color:inherit;overflow:visible;pointer-events:none}#toast-root::backdrop{display:none;background:transparent;pointer-events:none}@keyframes m3ToastEnter{0%{opacity:0;transform:translateY(-10px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.toast{pointer-events:auto;display:inline-flex;align-items:center;gap:9px;max-width:min(560px,calc(100vw - 24px));padding:10px 18px;border-radius:var(--m3-radius-full);background:var(--md-sys-color-inverse-surface);color:var(--md-sys-color-inverse-on-surface);box-shadow:var(--m3-elevation-float);font-size:var(--fs-14);font-weight:550;opacity:0;transform:translateY(-10px) scale(.95);transition:opacity .2s var(--m3-ease-smooth),transform .24s var(--m3-ease-spring);cursor:pointer}.toast-msg{min-width:0;overflow-wrap:break-word}.toast.is-visible{opacity:1;transform:translateY(0) scale(1);animation:m3ToastEnter .24s var(--m3-ease-spring)}.toast.is-leaving{opacity:0;transform:translateY(-8px) scale(.96)}.toast-success{background:var(--m3-color-success-container);color:var(--m3-color-on-success-container)}.toast-warning{background:var(--m3-color-warning-container);color:var(--m3-color-on-warning-container)}.toast-error{background:var(--m3-color-error-container);color:var(--m3-color-on-error-container)}.m3-settings-group{display:flex;flex-direction:column;gap:3px}.m3-settings-item{background:var(--md-sys-color-surface-container-low);padding:16px 20px;border-radius:var(--m3-radius-xs);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.m3-settings-item:first-child{border-top-left-radius:var(--m3-radius-lg-plus);border-top-right-radius:var(--m3-radius-lg-plus)}.m3-settings-item:last-child{border-bottom-left-radius:var(--m3-radius-lg-plus);border-bottom-right-radius:var(--m3-radius-lg-plus)}.page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px}.page-title{display:flex;align-items:center;gap:10px;font-size:var(--fs-24);font-weight:700;color:var(--md-sys-color-on-surface);margin-bottom:4px}.page-subtitle{font-size:var(--fs-14);color:var(--md-sys-color-on-surface-variant)}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.stack-lg{display:flex;flex-direction:column;gap:var(--section-gap, 20px)}.stack-md{display:flex;flex-direction:column;gap:14px}.flex-between{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.stat-kpi-card{background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus);padding:18px 20px;display:flex;flex-direction:column;gap:6px}.stat-kpi-label{font-size:var(--fs-13);color:var(--md-sys-color-on-surface-variant);font-weight:600}.stat-kpi-value{font-family:var(--font-mono);font-size:1.75rem;font-weight:700;color:var(--md-sys-color-on-surface);line-height:1.2}.knowledge-shell{display:grid;grid-template-columns:264px minmax(0,1fr);gap:20px;align-items:start}.knowledge-tree-panel{background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus);padding:14px;max-height:calc(100vh - 108px);overflow-y:auto;position:sticky;top:16px}.question-panel{background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus);padding:24px}.question-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px}.question-stem{font-size:1.06rem;line-height:1.85;color:var(--md-sys-color-on-surface);margin:16px 0;overflow-x:auto}.solution-panel{margin-top:18px;padding:18px 20px;border-radius:var(--m3-radius-lg);background:var(--md-sys-color-surface-container)}.solution-step{padding:11px 14px;background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-md);margin-bottom:8px}.exam-workspace{display:grid;grid-template-columns:minmax(0,1fr) 268px;gap:20px;align-items:start}.exam-timer{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:1.08rem;font-weight:700;padding:5px 14px;border-radius:var(--m3-radius-full);background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface)}.exam-timer.is-urgent{background:var(--m3-color-error-container);color:var(--m3-color-on-error-container)}.q-nav-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.q-nav-btn{position:relative;height:36px;border-radius:var(--m3-radius-sm);border:none;background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-family:var(--font-mono);font-size:var(--fs-12);font-weight:650;cursor:pointer;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth),transform var(--m3-dur-short) var(--m3-ease-spring)}.q-nav-btn.is-answered{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.q-nav-btn.is-flagged{background:var(--m3-color-warning-container);color:var(--m3-color-on-warning-container)}.q-nav-btn.is-current{background:var(--md-sys-color-primary);color:var(--md-sys-color-on-primary)}.demo-split,.demo-workspace{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:18px;align-items:start}.demo-canvas-card{background:var(--md-sys-color-surface-container-lowest);border-radius:var(--m3-radius-lg-plus);padding:14px;overflow:hidden}.demo-controls-card{background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus);padding:18px;display:flex;flex-direction:column;gap:14px}.demo-readout{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-md);padding:12px 14px;font-size:var(--fs-14);line-height:1.65}.filter-bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus);padding:12px 16px;margin-bottom:16px}.empty-state{text-align:center;padding:44px 20px;color:var(--md-sys-color-on-surface-variant)}.m3-chart-wrap{position:relative;width:100%}.m3-chart-tooltip{position:absolute;z-index:40;pointer-events:none;padding:7px 11px;border-radius:var(--m3-radius-md);background:var(--md-sys-color-inverse-surface);color:var(--md-sys-color-inverse-on-surface);font-size:var(--fs-12);line-height:1.45;box-shadow:var(--m3-elevation-float);white-space:nowrap}@media (max-width: 1023px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.exam-workspace,.demo-split,.demo-workspace{grid-template-columns:1fr}}@media (max-width: 767px){.grid-2,.grid-3,.grid-4,.knowledge-shell{grid-template-columns:1fr}.knowledge-tree-panel{position:static;max-height:300px}.question-panel{padding:16px}}.app-shell{min-height:100vh;display:flex;flex-direction:column;background:var(--md-sys-color-surface-dim);color:var(--md-sys-color-on-surface)}.topbar{position:sticky;top:0;z-index:200;height:var(--topbar-h);background:var(--md-sys-color-surface-dim);display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 16px}.topbar-left{display:flex;align-items:center;gap:8px;flex-shrink:0;min-width:0}.sidebar-toggle-btn{width:40px;height:40px}.topbar-brand{display:inline-flex;align-items:center;gap:9px;color:var(--md-sys-color-on-surface);font-weight:700;font-size:1.04rem;letter-spacing:-.015em;text-decoration:none;padding:4px 8px 4px 4px;border-radius:var(--m3-radius-full);transition:color var(--m3-dur-fast) var(--m3-ease-smooth)}.topbar-brand:hover{color:var(--md-sys-color-primary)}.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:10px;background:var(--md-sys-color-primary);color:var(--md-sys-color-on-primary);font-family:Times New Roman,Georgia,serif;font-size:1.24rem;font-weight:700;line-height:1;flex-shrink:0}.brand-text{white-space:nowrap}.course-switcher-chip{position:relative;overflow:hidden;isolation:isolate;display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 10px 0 12px;border-radius:var(--m3-radius-full);border:none;background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface);font-size:var(--fs-13);font-weight:600;cursor:pointer;max-width:240px;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth),transform var(--m3-dur-short) var(--m3-ease-spring)}.course-switcher-chip:hover{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.course-switcher-chip:active{transform:scale(.97)}.course-switcher-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.course-switcher-sub{font-size:.72rem;color:var(--md-sys-color-on-surface-variant);padding-left:6px;border-left:1px solid var(--md-sys-color-outline-variant);white-space:nowrap}.topbar-search{position:relative;flex:1 1 440px;max-width:500px}.topbar-search-box{position:relative;display:flex;align-items:center}.topbar-search-icon{position:absolute;left:14px;color:var(--md-sys-color-on-surface-variant);pointer-events:none;display:inline-flex}.topbar-search-input{width:100%;height:40px;padding:0 76px 0 42px;border-radius:var(--m3-radius-full);border:1.5px solid transparent;background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-size:var(--fs-14);transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth),border-color var(--m3-dur-fast) var(--m3-ease-smooth),box-shadow var(--m3-dur-fast) var(--m3-ease-smooth)}.topbar-search-input::placeholder{color:var(--md-sys-color-on-surface-variant);opacity:.85}.topbar-search-input:focus{outline:none;background:var(--md-sys-color-surface-bright);border-color:var(--md-sys-color-primary)}[data-theme=dark] .topbar-search-input:focus{background:var(--md-sys-color-surface-container-low)}.topbar-search-kbd{position:absolute;right:12px;pointer-events:none;display:inline-flex;align-items:center;gap:4px}.quick-search-popover{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--md-sys-color-surface-container-high);border-radius:var(--m3-radius-lg-plus);box-shadow:var(--m3-elevation-modal);max-height:440px;overflow-y:auto;z-index:320;padding:6px}.quick-search-group-title{display:flex;align-items:center;gap:6px;padding:8px 12px 4px;font-size:var(--fs-12);font-weight:700;color:var(--md-sys-color-on-surface-variant)}.quick-search-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 12px;border-radius:var(--m3-radius-md);color:var(--md-sys-color-on-surface);font-size:var(--fs-14);cursor:pointer;text-decoration:none;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth),color var(--m3-dur-fast) var(--m3-ease-smooth)}.quick-search-item:hover,.quick-search-item.is-active{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.quick-search-footer{margin-top:4px;padding:9px 12px;border-radius:var(--m3-radius-md);font-size:var(--fs-13);font-weight:600;text-align:center;color:var(--md-sys-color-primary);background:var(--md-sys-color-surface-container);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;border:none;width:100%}.quick-search-footer:hover{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.topbar-actions{display:flex;align-items:center;gap:4px;flex-shrink:0}.app-body{display:flex;flex:1;min-height:calc(100vh - var(--topbar-h));align-items:stretch;padding:0 12px 12px 0}.nav-rail{width:var(--drawer-w);flex-shrink:0;background:transparent;padding:4px 10px 12px 12px;display:flex;flex-direction:column;justify-content:space-between;position:sticky;top:var(--topbar-h);height:calc(100vh - var(--topbar-h));overflow-y:auto;overflow-x:hidden;transition:width var(--m3-dur-medium) var(--m3-ease-standard),padding var(--m3-dur-medium) var(--m3-ease-standard)}.nav-rail-list{display:flex;flex-direction:column;gap:4px}.nav-rail-item{position:relative;overflow:hidden;isolation:isolate;display:flex;align-items:center;gap:12px;height:46px;padding:0 16px;border-radius:var(--m3-radius-full);color:var(--md-sys-color-on-surface-variant);font-size:var(--fs-14);font-weight:550;text-decoration:none;user-select:none;transition:background-color var(--m3-dur-short) var(--m3-ease-standard),color var(--m3-dur-fast) var(--m3-ease-smooth),transform var(--m3-dur-short) var(--m3-ease-spring)}.nav-rail-item:after{content:"";position:absolute;inset:0;border-radius:inherit;background:currentColor;opacity:0;pointer-events:none;transition:opacity var(--m3-dur-fast) var(--m3-ease-smooth)}.nav-rail-item:hover:after{opacity:.08}.nav-rail-item:active{transform:scale(.975)}.nav-rail-item:active:after{opacity:.12}.nav-rail-item.is-active{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container);font-weight:700}.nav-rail-pill{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:var(--m3-radius-full);flex-shrink:0;position:relative;transition:width var(--m3-dur-medium) var(--m3-ease-spring),background-color var(--m3-dur-short) var(--m3-ease-standard)}.nav-rail-label{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nav-rail-short-label{display:none}.nav-badge{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:19px;padding:0 6px;border-radius:var(--m3-radius-full);font-family:var(--font-mono);font-size:11px;font-weight:700;background:var(--m3-color-error);color:var(--m3-color-on-error);line-height:1}.nav-badge.badge-primary{background:var(--md-sys-color-primary);color:var(--md-sys-color-on-primary)}.nav-badge:empty{display:none}.nav-rail-footer{margin-top:12px;padding:12px 14px;border-radius:var(--m3-radius-lg);background:var(--md-sys-color-surface-container);font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant);line-height:1.55}.nav-rail-hub-link{display:inline-flex;align-items:center;gap:6px;margin-top:6px;font-weight:600;color:var(--md-sys-color-primary)}.app-shell.is-rail-collapsed .nav-rail{width:var(--rail-w);padding:4px 6px 12px}.app-shell.is-rail-collapsed .nav-rail-list{gap:6px}.app-shell.is-rail-collapsed .nav-rail-item{flex-direction:column;justify-content:center;gap:4px;height:58px;padding:4px 2px;border-radius:var(--m3-radius-lg);background:transparent!important}.app-shell.is-rail-collapsed .nav-rail-item:after{display:none}.app-shell.is-rail-collapsed .nav-rail-pill{width:52px;height:30px;border-radius:var(--m3-radius-full)}.app-shell.is-rail-collapsed .nav-rail-item:hover .nav-rail-pill{background:rgba(var(--md-sys-color-on-surface-rgb),.08)}.app-shell.is-rail-collapsed .nav-rail-item.is-active .nav-rail-pill{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.app-shell.is-rail-collapsed .nav-rail-label,.app-shell.is-rail-collapsed .nav-rail-footer{display:none}.app-shell.is-rail-collapsed .nav-rail-short-label{display:block;font-size:11px;line-height:1.15;font-weight:600;text-align:center}.app-shell.is-rail-collapsed .nav-badge{position:absolute;top:2px;right:8px;min-width:16px;height:16px;padding:0 4px;font-size:10px}.app-shell.is-immersive-exam .nav-rail{display:none}.app-shell.is-immersive-exam 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reduce){.m3-fc-inner,.m3-fc-front,.m3-fc-back,.m3-fc-scene{transition:none!important;animation:none!important}}.demos-page{display:flex;flex-direction:column;gap:22px;padding-bottom:32px;animation:m3-fade-up .28s var(--m3-ease-spring, cubic-bezier(.2, 0, 0, 1)) both}@keyframes m3-fade-up{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.demos-hero{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:24px 28px;border-radius:var(--m3-radius-xl, 28px);background:var(--md-sys-color-surface-container-low)}.demos-hero:before{content:"";position:absolute;right:-40px;top:-60px;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(var(--md-sys-color-primary-rgb, 57, 102, 65),.12) 0%,transparent 70%);pointer-events:none}.demos-hero-main{position:relative;z-index:1;max-width:700px;display:flex;flex-direction:column;gap:8px}.demos-hero-eyebrow{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;padding:4px 12px;border-radius:var(--m3-radius-full, 9999px);background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container);font-size:var(--fs-12, .78rem);font-weight:700;letter-spacing:.02em}.demos-hero-title{margin:0;font-size:clamp(1.38rem,2.3vw,1.75rem);font-weight:800;letter-spacing:-.015em;color:var(--md-sys-color-on-surface);display:flex;align-items:center;gap:10px}.demos-hero-desc{margin:0;font-size:var(--fs-14, .92rem);line-height:1.68;color:var(--md-sys-color-on-surface-variant)}.demos-hero-desc code{padding:2px 7px;border-radius:6px;background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-primary);font-family:var(--font-mono, "JetBrains Mono", monospace);font-size:.85em}.demos-hero-stats{position:relative;z-index:1;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.demos-hero-stat{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:12px 18px;border-radius:18px;background:var(--md-sys-color-surface-container);min-width:108px}.demos-hero-stat-num{font-family:var(--font-mono, "JetBrains Mono", monospace);font-variant-numeric:tabular-nums;font-size:1.45rem;font-weight:800;line-height:1.15;color:var(--md-sys-color-primary)}.demos-hero-stat-lbl{font-size:var(--fs-12, .78rem);font-weight:600;color:var(--md-sys-color-on-surface-variant)}.demos-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:14px 18px;border-radius:20px;background:var(--md-sys-color-surface-container-low)}.demos-chip-group{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.demos-search-box{position:relative;display:flex;align-items:center;min-width:250px;flex:0 1 320px}.demos-search-icon{position:absolute;left:13px;color:var(--md-sys-color-on-surface-variant);pointer-events:none;display:inline-flex}.demos-search-input{width:100%;height:38px;padding:0 36px 0 38px;border-radius:var(--m3-radius-full, 9999px);border:1.5px solid transparent;background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface);font-size:var(--fs-13, .86rem);transition:background-color .16s ease,border-color .16s ease}.demos-search-input:focus{outline:none;border-color:var(--md-sys-color-primary);background:var(--md-sys-color-surface-container-lowest)}.demos-search-clear{position:absolute;right:6px;width:26px;height:26px;border-radius:50%;border:none;background:transparent;color:var(--md-sys-color-on-surface-variant);display:inline-flex;align-items:center;justify-content:center;cursor:pointer}.demos-search-clear:hover{background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface)}.demos-chapter-sec{display:flex;flex-direction:column;gap:14px}.demos-chapter-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:2px 4px}.demos-chapter-title-wrap{display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap}.demos-chapter-title{margin:0;font-size:1.08rem;font-weight:750;color:var(--md-sys-color-on-surface)}.demos-chapter-count{font-family:var(--font-mono, "JetBrains Mono", monospace);font-variant-numeric:tabular-nums;font-size:var(--fs-12, .78rem);color:var(--md-sys-color-on-surface-variant)}.demos-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(305px,1fr));gap:16px}.demos-card{position:relative;display:flex;flex-direction:column;gap:12px;padding:16px;border-radius:22px;background:var(--md-sys-color-surface-container-low);color:var(--md-sys-color-on-surface);cursor:pointer;outline:none;transition:transform .22s var(--m3-ease-spring, cubic-bezier(.2, 0, 0, 1)),border-radius .22s ease,background-color .18s ease}.demos-card:hover{background:var(--md-sys-color-surface-container);transform:translateY(-3px)}.demos-card:focus-visible{box-shadow:0 0 0 2px var(--md-sys-color-primary)}.demos-card:active{transform:scale(.99);border-radius:18px}.demos-card-thumb{position:relative;width:100%;aspect-ratio:200 / 112;border-radius:16px;overflow:hidden;background:var(--md-sys-color-surface-container-lowest);border:1px solid rgba(var(--md-sys-color-outline-variant-rgb, 192, 201, 191),.45)}.demos-thumb-svg{width:100%;height:100%;display:block}.demos-card-id-pill{position:absolute;top:9px;left:9px;padding:2px 9px;border-radius:var(--m3-radius-full, 9999px);background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-primary);font-family:var(--font-mono, "JetBrains Mono", monospace);font-variant-numeric:tabular-nums;font-size:.73rem;font-weight:700}.demos-card-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}.demos-card-sec{font-size:var(--fs-12, .78rem);font-weight:600;color:var(--md-sys-color-on-surface-variant);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.demos-card-title{margin:0;font-size:1.04rem;font-weight:750;line-height:1.38;color:var(--md-sys-color-on-surface)}.demos-card-summary{margin:0;font-size:var(--fs-13, .86rem);line-height:1.62;color:var(--md-sys-color-on-surface-variant);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}.demos-card-tags{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.demos-concept-pill{display:inline-flex;align-items:center;padding:2px 8px;border-radius:var(--m3-radius-full, 9999px);background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface-variant);font-size:.72rem;font-weight:600}.demos-kp-chip{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:var(--m3-radius-full, 9999px);border:none;background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container);font-family:var(--font-mono, "JetBrains Mono", monospace);font-size:.73rem;font-weight:600;cursor:pointer;text-decoration:none;transition:background-color .15s ease,transform .15s ease}.demos-kp-chip:hover{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container);transform:translateY(-1px)}.demos-card-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-top:8px;border-top:1px solid rgba(var(--md-sys-color-outline-variant-rgb, 192, 201, 191),.4)}.demos-card-kps{display:flex;align-items:center;gap:5px;flex-wrap:wrap}.demos-card-cta{display:inline-flex;align-items:center;gap:4px;font-size:var(--fs-13, .85rem);font-weight:700;color:var(--md-sys-color-primary);white-space:nowrap;transition:transform .18s ease}.demos-card:hover .demos-card-cta{transform:translate(3px)}.demos-detail{display:flex;flex-direction:column;gap:16px}.demos-detail.is-immersive{position:fixed;inset:0;z-index:950;padding:16px 20px 24px;background:var(--md-sys-color-background, var(--md-sys-color-surface));overflow-y:auto}.demos-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:12px 16px;border-radius:20px;background:var(--md-sys-color-surface-container-low)}.demos-topbar-nav,.demos-topbar-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.demos-switcher-wrap{display:inline-flex;align-items:center;gap:4px;padding:3px;border-radius:var(--m3-radius-full, 9999px);background:var(--md-sys-color-surface-container)}.demos-switcher-select{height:32px;min-width:210px;max-width:310px;padding:0 28px 0 12px;border-radius:var(--m3-radius-full, 9999px);border:none;background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface);font-size:var(--fs-13, .85rem);font-weight:600;cursor:pointer}.demos-switcher-select:focus{outline:2px solid var(--md-sys-color-primary);outline-offset:-2px}.demos-detail-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:18px 22px;border-radius:22px;background:var(--md-sys-color-surface-container-low)}.demos-detail-title-col{display:flex;flex-direction:column;gap:8px;flex:1;min-width:260px}.demos-detail-badges{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.demos-detail-title{margin:0;font-size:clamp(1.22rem,2vw,1.48rem);font-weight:800;letter-spacing:-.01em;color:var(--md-sys-color-on-surface)}.demos-detail-summary{margin:0;font-size:var(--fs-14, .92rem);line-height:1.65;color:var(--md-sys-color-on-surface-variant)}.demos-detail-kps{display:flex;align-items:center;gap:7px;flex-wrap:wrap}.demos-workspace{display:grid;grid-template-columns:minmax(0,7fr) minmax(320px,3.3fr);gap:16px;align-items:start}.demos-workspace.is-wide-stage{grid-template-columns:minmax(0,1fr)}.demos-workspace.is-wide-stage .demos-side-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(310px,1fr));gap:16px}.demos-stage-card{display:flex;flex-direction:column;gap:10px;padding:14px 16px 16px;border-radius:24px;background:var(--md-sys-color-surface-container-low);min-width:0}.demos-stage-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:0 4px}.demos-stage-label{display:inline-flex;align-items:center;gap:6px;font-size:var(--fs-13, .86rem);font-weight:700;color:var(--md-sys-color-on-surface)}.demos-stage-hint{display:inline-flex;align-items:center;gap:5px;font-size:var(--fs-12, .78rem);color:var(--md-sys-color-on-surface-variant)}.demos-canvas-frame{position:relative;width:100%;height:clamp(360px,56vh,540px);border-radius:18px;overflow:hidden;background:var(--md-sys-color-surface-container-lowest);border:1px solid rgba(var(--md-sys-color-outline-variant-rgb, 192, 201, 191),.5)}.demos-workspace.is-wide-stage .demos-canvas-frame,.demos-detail.is-immersive .demos-canvas-frame{height:clamp(440px,68vh,700px)}.demos-canvas{display:block;width:100%;height:100%;touch-action:none}.demos-side-col{display:flex;flex-direction:column;gap:14px;min-width:0}.demos-panel-card{display:flex;flex-direction:column;gap:12px;padding:16px 18px;border-radius:22px;background:var(--md-sys-color-surface-container-low)}.demos-panel-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-bottom:8px;border-bottom:1px solid rgba(var(--md-sys-color-outline-variant-rgb, 192, 201, 191),.4)}.demos-panel-title{display:inline-flex;align-items:center;gap:7px;font-size:.94rem;font-weight:750;color:var(--md-sys-color-on-surface)}.demos-controls-host,.demos-readout-host{min-width:0;font-variant-numeric:tabular-nums}.demos-principle-card{display:flex;flex-direction:column;gap:14px;padding:22px 24px;border-radius:24px;background:var(--md-sys-color-surface-container-low)}.demos-principle-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.demos-principle-title{display:inline-flex;align-items:center;gap:8px;margin:0;font-size:1.05rem;font-weight:750;color:var(--md-sys-color-on-surface)}.demos-principle-body{display:flex;flex-direction:column;gap:10px;padding:16px 18px;border-radius:16px;background:var(--md-sys-color-surface-container-lowest);font-size:var(--fs-14, .93rem);line-height:1.78;color:var(--md-sys-color-on-surface)}.demos-principle-p{margin:0}.demos-related-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:8px;border-top:1px solid rgba(var(--md-sys-color-outline-variant-rgb, 192, 201, 191),.4)}.demos-related-kps-list{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.demos-related-label{display:inline-flex;align-items:center;gap:5px;font-size:var(--fs-13, .85rem);font-weight:700;color:var(--md-sys-color-on-surface-variant)}.demos-related-kp-btn{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--m3-radius-full, 9999px);border:none;background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container);font-size:var(--fs-12, .79rem);font-weight:600;cursor:pointer;text-decoration:none;transition:background-color .15s ease,transform .15s ease}.demos-related-kp-btn:hover{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container);transform:translateY(-1px)}.demos-related-kp-id{font-family:var(--font-mono, "JetBrains Mono", monospace);font-weight:700}.demos-related-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}@media (max-width: 1024px){.demos-workspace{grid-template-columns:minmax(0,1fr)}.demos-canvas-frame{height:clamp(320px,48vh,460px)}}@media (max-width: 640px){.demos-hero{padding:18px}.demos-toolbar{padding:12px 14px}.demos-search-box{flex:1 1 100%;min-width:0}.demos-switcher-select{min-width:160px;max-width:210px}.demos-detail-header,.demos-principle-card{padding:16px}}.exam-page{display:flex;flex-direction:column;gap:var(--section-gap, 20px);padding-bottom:36px}.exam-hero-card{position:relative;overflow:hidden;border-radius:var(--m3-radius-xl);padding:26px 28px;background:color-mix(in srgb,var(--md-sys-color-primary-container) 34%,var(--md-sys-color-surface-container-low));display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.exam-hero-main{display:flex;flex-direction:column;gap:8px;max-width:680px}.exam-hero-eyebrow{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;padding:4px 12px;border-radius:var(--m3-radius-full);background:var(--md-sys-color-surface-container-lowest);color:var(--md-sys-color-primary);font-size:var(--fs-12);font-weight:700}.exam-hero-title{display:flex;align-items:center;gap:10px;font-size:var(--fs-24);font-weight:750;color:var(--md-sys-color-on-surface);margin:0}.exam-hero-desc{font-size:var(--fs-14);color:var(--md-sys-color-on-surface-variant);line-height:1.68;margin:0}.exam-hero-kpis{display:flex;align-items:stretch;gap:12px;flex-wrap:wrap}.exam-hero-kpi{min-width:112px;padding:12px 16px;border-radius:var(--m3-radius-lg);background:var(--md-sys-color-surface-container-lowest);display:flex;flex-direction:column;gap:2px}.exam-hero-kpi-val{font-family:var(--font-mono);font-size:1.38rem;font-weight:750;color:var(--md-sys-color-on-surface);line-height:1.2}.exam-hero-kpi-lbl{font-size:var(--fs-12);font-weight:600;color:var(--md-sys-color-on-surface-variant)}.exam-draft-banner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:18px 22px;border-radius:var(--m3-radius-lg-plus);background:color-mix(in srgb,var(--m3-color-warning-container) 62%,var(--md-sys-color-surface-container-low));color:var(--md-sys-color-on-surface)}.exam-draft-info{display:flex;align-items:flex-start;gap:14px;min-width:0;flex:1}.exam-draft-icon-wrap{width:42px;height:42px;border-radius:var(--m3-radius-md);background:var(--m3-color-warning);color:var(--m3-color-on-warning);display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.exam-draft-title{font-size:var(--fs-16);font-weight:700;color:var(--md-sys-color-on-surface);margin-bottom:4px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.exam-draft-meta{font-size:var(--fs-13);color:var(--md-sys-color-on-surface-variant);display:flex;align-items:center;gap:12px;flex-wrap:wrap}.exam-draft-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.exam-section-card{background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus);padding:22px 24px}.exam-section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}.exam-section-title{display:inline-flex;align-items:center;gap:9px;font-size:var(--fs-18);font-weight:700;color:var(--md-sys-color-on-surface);margin:0}.exam-section-sub{font-size:var(--fs-13);color:var(--md-sys-color-on-surface-variant)}.exam-papers-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(305px,1fr));gap:16px}.exam-paper-card{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-lg);padding:20px;display:flex;flex-direction:column;justify-content:space-between;gap:16px;transition:transform var(--m3-dur-short) var(--m3-ease-spring),background-color var(--m3-dur-fast) var(--m3-ease-smooth)}.exam-paper-card:hover{background:var(--md-sys-color-surface-container-high);transform:translateY(-2px)}.exam-paper-top{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px}.exam-paper-stars{display:inline-flex;align-items:center;gap:2px;color:var(--m3-color-warning)}.exam-paper-stars .is-dim{opacity:.28}.exam-paper-title{font-size:1.06rem;font-weight:700;color:var(--md-sys-color-on-surface);line-height:1.45;margin-bottom:6px}.exam-paper-desc{font-size:var(--fs-13);color:var(--md-sys-color-on-surface-variant);line-height:1.6}.exam-paper-pills{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}.exam-meta-pill{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:var(--m3-radius-full);background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface-variant);font-size:var(--fs-12);font-weight:600}.exam-meta-pill.is-best{background:var(--m3-color-success-container);color:var(--m3-color-on-success-container);font-weight:700}.exam-paper-actions{display:flex;align-items:center;gap:8px}.exam-builder-top-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:18px;margin-bottom:18px}.exam-builder-block{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-lg);padding:16px 18px;display:flex;flex-direction:column;gap:10px}.exam-builder-label{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:var(--fs-13);font-weight:700;color:var(--md-sys-color-on-surface)}.exam-builder-chips{display:flex;flex-wrap:wrap;gap:8px}.exam-duration-row{display:flex;align-items:center;gap:12px;margin-top:2px}.exam-duration-row input[type=range]{flex:1}.exam-num-input{width:68px;height:36px;padding:4px 8px;border-radius:var(--m3-radius-sm);border:1.5px solid transparent;background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-family:var(--font-mono);font-size:var(--fs-14);font-weight:700;text-align:center;font-variant-numeric:tabular-nums;transition:border-color var(--m3-dur-fast) var(--m3-ease-smooth),background-color var(--m3-dur-fast) var(--m3-ease-smooth)}.exam-num-input:focus{outline:none;border-color:var(--md-sys-color-primary);background:var(--md-sys-color-surface-container-lowest)}.exam-specs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:12px}.exam-spec-card{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-lg);padding:14px 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.78rem);font-weight:700;font-variant-numeric:tabular-nums}.home-streak-pill.is-idle{background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface-variant)}.home-greeting-title{margin:0;display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:clamp(1.42rem,2.4vw,1.85rem);font-weight:800;letter-spacing:-.015em;color:var(--md-sys-color-on-surface)}.home-greeting-sub{margin:0;font-size:var(--fs-14, .93rem);line-height:1.65;color:var(--md-sys-color-on-surface-variant);max-width:640px}.home-goal-box{position:relative;z-index:1;display:flex;align-items:center;gap:16px;padding:16px 20px;border-radius:22px;background:var(--md-sys-color-surface-container)}.home-goal-info{display:flex;flex-direction:column;gap:4px}.home-goal-title{font-size:var(--fs-12, .78rem);font-weight:700;color:var(--md-sys-color-on-surface-variant)}.home-goal-nums{font-family:var(--font-mono, "JetBrains Mono", monospace);font-variant-numeric:tabular-nums;font-size:1.25rem;font-weight:800;color:var(--md-sys-color-on-surface)}.home-goal-nums span{font-size:.86rem;font-weight:600;color:var(--md-sys-color-on-surface-variant)}.home-goal-meta{display:flex;flex-direction:column;gap:2px;font-size:.76rem;color:var(--md-sys-color-on-surface-variant);font-variant-numeric:tabular-nums}.home-resume-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:14px 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.93rem);font-weight:750;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.home-kpi-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.home-kpi-card{display:flex;flex-direction:column;justify-content:space-between;gap:10px;padding:18px 20px;border-radius:22px;background:var(--md-sys-color-surface-container-low);color:var(--md-sys-color-on-surface);text-decoration:none;transition:transform .2s var(--m3-ease-spring, cubic-bezier(.2, 0, 0, 1)),border-radius .2s ease,background-color .16s ease}.home-kpi-card:hover{background:var(--md-sys-color-surface-container);transform:translateY(-2px)}.home-kpi-card:active{transform:scale(.985);border-radius:18px}.home-kpi-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.home-kpi-label{font-size:var(--fs-13, .85rem);font-weight:650;color:var(--md-sys-color-on-surface-variant)}.home-kpi-icon{width:34px;height:34px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.home-kpi-icon.tone-primary{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.home-kpi-icon.tone-tertiary{background:var(--md-sys-color-tertiary-container);color:var(--md-sys-color-on-tertiary-container)}.home-kpi-icon.tone-warning{background:var(--m3-color-warning-container);color:var(--m3-color-on-warning-container)}.home-kpi-icon.tone-error{background:var(--m3-color-error-container);color:var(--m3-color-on-error-container)}.home-kpi-icon.tone-success{background:var(--m3-color-success-container);color:var(--m3-color-on-success-container)}.home-kpi-value{font-family:var(--font-mono, "JetBrains Mono", monospace);font-variant-numeric:tabular-nums;font-size:1.65rem;font-weight:800;line-height:1.15;color:var(--md-sys-color-on-surface)}.home-kpi-value small{font-family:var(--font-sans);font-size:.82rem;font-weight:600;margin-left:4px;color:var(--md-sys-color-on-surface-variant)}.home-kpi-sub{font-size:var(--fs-12, .78rem);color:var(--md-sys-color-on-surface-variant);font-variant-numeric:tabular-nums}.home-sec{display:flex;flex-direction:column;gap:14px}.home-sec-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:0 2px}.home-sec-title{margin:0;display:inline-flex;align-items:center;gap:8px;font-size:1.08rem;font-weight:780;color:var(--md-sys-color-on-surface)}.home-sec-sub{font-size:var(--fs-12, .79rem);color:var(--md-sys-color-on-surface-variant)}.home-tasks-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.home-task-card{display:flex;flex-direction:column;justify-content:space-between;gap:14px;padding:20px 22px;border-radius:24px;background:var(--md-sys-color-surface-container-low);transition:background-color .18s ease,transform .2s var(--m3-ease-spring, cubic-bezier(.2, 0, 0, 1))}.home-task-card:hover{background:var(--md-sys-color-surface-container);transform:translateY(-2px)}.home-task-top{display:flex;flex-direction:column;gap:10px}.home-task-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.home-task-tag{display:inline-flex;align-items:center;gap:6px;font-size:var(--fs-13, .86rem);font-weight:750;color:var(--md-sys-color-on-surface)}.home-task-metric{display:flex;align-items:baseline;gap:6px}.home-task-num{font-family:var(--font-mono, "JetBrains Mono", monospace);font-variant-numeric:tabular-nums;font-size:2rem;font-weight:800;line-height:1.1;color:var(--md-sys-color-primary)}.home-task-num.is-warning{color:var(--m3-color-warning)}.home-task-num.is-error{color:var(--m3-color-error)}.home-task-num.is-success{color:var(--m3-color-success)}.home-task-unit{font-size:var(--fs-13, .86rem);font-weight:650;color:var(--md-sys-color-on-surface-variant)}.home-task-desc{margin:0;font-size:var(--fs-13, .85rem);line-height:1.6;color:var(--md-sys-color-on-surface-variant);font-variant-numeric:tabular-nums}.home-task-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.home-chapters-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.home-ch-card{display:flex;flex-direction:column;gap:14px;padding:20px 22px;border-radius:24px;background:var(--md-sys-color-surface-container-low)}.home-ch-top{display:flex;align-items:center;justify-content:space-between;gap:14px}.home-ch-info{display:flex;flex-direction:column;gap:6px;min-width:0}.home-ch-title{margin:0;font-size:1.06rem;font-weight:780;color:var(--md-sys-color-on-surface)}.home-ch-title a{color:inherit;text-decoration:none}.home-ch-title a:hover{color:var(--md-sys-color-primary)}.home-ch-stats{font-size:var(--fs-12, .78rem);color:var(--md-sys-color-on-surface-variant);font-variant-numeric:tabular-nums}.home-ch-sections{display:flex;flex-direction:column;gap:6px;padding-top:10px;border-top:1px solid rgba(var(--md-sys-color-outline-variant-rgb, 192, 201, 191),.4)}.home-sec-row{display:grid;grid-template-columns:minmax(0,1fr) 68px 38px;align-items:center;gap:8px;padding:5px 8px;border-radius:10px;text-decoration:none;color:var(--md-sys-color-on-surface);font-size:var(--fs-12, .79rem);transition:background-color .14s ease}.home-sec-row:hover{background:var(--md-sys-color-surface-container-high)}.home-sec-row-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:550}.home-sec-row-no{font-family:var(--font-mono, "JetBrains Mono", monospace);color:var(--md-sys-color-primary);font-weight:700;margin-right:5px}.home-sec-bar-track{height:6px;border-radius:999px;background:var(--md-sys-color-surface-container-highest);overflow:hidden}.home-sec-bar-fill{height:100%;border-radius:999px;background:var(--md-sys-color-primary);transition:width .32s var(--m3-ease-spring, cubic-bezier(.2, 0, 0, 1))}.home-sec-row-pct{text-align:right;font-family:var(--font-mono, "JetBrains Mono", monospace);font-variant-numeric:tabular-nums;font-size:.73rem;color:var(--md-sys-color-on-surface-variant)}.home-ch-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:8px;padding-top:6px}.home-analytics-split{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:16px;align-items:stretch}.home-chart-card,.home-weak-card{display:flex;flex-direction:column;gap:14px;padding:20px 22px;border-radius:24px;background:var(--md-sys-color-surface-container-low);min-width:0}.home-chart-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.home-week-summary{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.home-week-pill{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border-radius:var(--m3-radius-full, 9999px);background:var(--md-sys-color-surface-container);font-size:var(--fs-12, .78rem);color:var(--md-sys-color-on-surface-variant);font-variant-numeric:tabular-nums}.home-week-pill strong{font-family:var(--font-mono, "JetBrains Mono", monospace);color:var(--md-sys-color-on-surface);font-weight:750}.home-weak-list{display:flex;flex-direction:column;gap:8px;flex:1}.home-weak-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 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.86rem);font-weight:650;color:var(--md-sys-color-on-surface);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.home-weak-meta{display:flex;align-items:center;gap:8px;font-size:.74rem;color:var(--md-sys-color-on-surface-variant);font-variant-numeric:tabular-nums}.home-weak-mini-bar{width:64px;height:5px;border-radius:999px;background:var(--md-sys-color-surface-container-highest);overflow:hidden}.home-weak-mini-fill{height:100%;border-radius:999px}.home-weak-actions{display:inline-flex;align-items:center;gap:4px;flex-shrink:0}.home-quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.home-quick-card{display:flex;align-items:flex-start;gap:14px;padding:18px 20px;border-radius:22px;background:var(--md-sys-color-surface-container-low);color:var(--md-sys-color-on-surface);text-decoration:none;transition:transform .2s var(--m3-ease-spring, cubic-bezier(.2, 0, 0, 1)),border-radius .2s ease,background-color .16s ease}.home-quick-card:hover{background:var(--md-sys-color-surface-container);transform:translateY(-2px)}.home-quick-card:active{transform:scale(.985);border-radius:18px}.home-quick-icon{width:44px;height:44px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.home-quick-body{display:flex;flex-direction:column;gap:4px;min-width:0;flex:1}.home-quick-title{font-size:.96rem;font-weight:750;color:var(--md-sys-color-on-surface);display:flex;align-items:center;justify-content:space-between;gap:6px}.home-quick-desc{font-size:var(--fs-12, .79rem);line-height:1.55;color:var(--md-sys-color-on-surface-variant)}@media (max-width: 1120px){.home-kpi-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home-tasks-grid,.home-chapters-grid,.home-analytics-split{grid-template-columns:minmax(0,1fr)}.home-quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 780px){.home-hero{grid-template-columns:minmax(0,1fr);padding:20px}.home-goal-box{width:100%;justify-content:flex-start}.home-quick-grid{grid-template-columns:minmax(0,1fr)}}@media (max-width: 480px){.home-kpi-grid{grid-template-columns:minmax(0,1fr)}.home-sec-row{grid-template-columns:minmax(0,1fr) 42px}.home-sec-bar-track{display:none}}.kn-page{width:100%;max-width:1360px;margin:0 auto}.kn-mobile-bar{display:none;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.kn-layout{display:grid;grid-template-columns:288px minmax(0,1fr);gap:24px;align-items:start}.kn-sidebar{position:sticky;top:76px;max-height:calc(100vh - 96px);overflow-y:auto;background:var(--md-sys-color-surface-container-low);border-radius:var(--md-sys-shape-corner-large, 16px);padding:12px 10px;scrollbar-width:thin}.kn-sidebar-head{display:none;align-items:center;justify-content:space-between;padding:6px 10px 12px;margin-bottom:6px;border-bottom:1px solid color-mix(in srgb,var(--md-sys-color-outline-variant) 45%,transparent);font-weight:600;color:var(--md-sys-color-on-surface)}.kn-tree-overview-link{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;border-radius:var(--md-sys-shape-corner-full, 9999px);color:var(--md-sys-color-on-surface-variant);font-size:.9rem;font-weight:600;text-decoration:none;margin-bottom:8px;transition:background-color .18s cubic-bezier(.2,0,0,1),color .18s cubic-bezier(.2,0,0,1)}.kn-tree-overview-link:hover{background:color-mix(in srgb,var(--md-sys-color-on-surface) 8%,transparent);color:var(--md-sys-color-on-surface);text-decoration:none}.kn-tree-overview-link.is-active{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.kn-tree-ch{margin-bottom:6px}.kn-tree-ch-row{display:flex;align-items:center;gap:4px;padding:6px 8px;border-radius:12px;transition:background-color .16s ease}.kn-tree-ch-row:hover{background:color-mix(in srgb,var(--md-sys-color-on-surface) 6%,transparent)}.kn-tree-ch-row.is-active{background:color-mix(in srgb,var(--md-sys-color-primary-container) 72%,transparent)}.kn-tree-toggle{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border:none;border-radius:9999px;background:transparent;color:var(--md-sys-color-on-surface-variant);cursor:pointer;flex-shrink:0;padding:0;transition:transform .24s cubic-bezier(.22,1,.36,1),background-color .15s ease}.kn-tree-toggle:hover{background:color-mix(in srgb,var(--md-sys-color-on-surface) 10%,transparent);color:var(--md-sys-color-on-surface)}.kn-tree-toggle.is-open{transform:rotate(90deg)}.kn-tree-ch-link{flex:1;min-width:0;font-size:.875rem;font-weight:600;color:var(--md-sys-color-on-surface);text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:3px 2px}.kn-tree-ch-row.is-active .kn-tree-ch-link{color:var(--md-sys-color-on-primary-container)}.kn-tree-ch-link:hover{color:var(--md-sys-color-primary);text-decoration:none}.kn-tree-pct{font-size:.75rem;font-weight:600;color:var(--md-sys-color-on-surface-variant);padding:2px 6px;border-radius:9999px;background:var(--md-sys-color-surface-container-high);flex-shrink:0}.kn-tree-secs{padding-left:12px;margin-top:3px;display:flex;flex-direction:column;gap:2px}.kn-tree-sec-row{display:flex;align-items:center;gap:4px;padding:5px 8px 5px 4px;border-radius:10px;transition:background-color .15s ease}.kn-tree-sec-row:hover{background:color-mix(in srgb,var(--md-sys-color-on-surface) 6%,transparent)}.kn-tree-sec-row.is-active{background:var(--md-sys-color-secondary-container)}.kn-tree-sec-link{flex:1;min-width:0;font-size:.82rem;color:var(--md-sys-color-on-surface-variant);text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:2px 0}.kn-tree-sec-row.is-active .kn-tree-sec-link{color:var(--md-sys-color-on-secondary-container);font-weight:600}.kn-tree-sec-link:hover{color:var(--md-sys-color-primary);text-decoration:none}.kn-tree-sec-prog{display:inline-flex;align-items:center;gap:5px;flex-shrink:0}.kn-mini-bar{width:28px;height:4px;border-radius:9999px;background:var(--md-sys-color-surface-container-highest);overflow:hidden}.kn-mini-bar>i{display:block;height:100%;border-radius:inherit;background:var(--md-sys-color-primary);transition:width .26s cubic-bezier(.22,1,.36,1)}.kn-mini-pct{font-size:.7rem;color:var(--md-sys-color-on-surface-variant);min-width:26px;text-align:right}.kn-tree-kps{padding-left:22px;display:flex;flex-direction:column;gap:2px;border-left:1.5px solid color-mix(in srgb,var(--md-sys-color-outline-variant) 55%,transparent);margin:2px 0 6px 16px}.kn-tree-kp-link{display:flex;align-items:center;gap:6px;padding:5px 8px;border-radius:8px;font-size:.79rem;color:var(--md-sys-color-on-surface-variant);text-decoration:none;transition:background-color .14s ease,color .14s ease}.kn-tree-kp-link:hover{background:color-mix(in srgb,var(--md-sys-color-on-surface) 7%,transparent);color:var(--md-sys-color-on-surface);text-decoration:none}.kn-tree-kp-id{font-family:var(--font-mono, "JetBrains Mono", monospace);font-size:.72rem;color:var(--md-sys-color-outline);flex-shrink:0}.kn-tree-kp-title{min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.kn-mark-icon.is-understood{color:var(--m3-color-success, #1e8e3e)}.kn-mark-icon.is-read{color:var(--md-sys-color-primary)}.kn-mark-icon.is-review{color:var(--m3-color-warning, #e37400)}.kn-mark-icon.is-unread{color:var(--md-sys-color-outline);opacity:.7}.kn-main{min-width:0;display:flex;flex-direction:column;gap:20px}.kn-breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:.85rem;color:var(--md-sys-color-on-surface-variant)}.kn-breadcrumb a{color:var(--md-sys-color-on-surface-variant);text-decoration:none;padding:3px 8px;border-radius:9999px;transition:background-color .15s ease,color .15s ease}.kn-breadcrumb a:hover{background:color-mix(in srgb,var(--md-sys-color-primary) 10%,transparent);color:var(--md-sys-color-primary)}.kn-breadcrumb-cur{font-weight:600;color:var(--md-sys-color-on-surface);padding:3px 6px}.kn-page-intro{display:flex;align-items:flex-end;justify-content:space-between;flex-wrap:wrap;gap:12px}.kn-page-title{display:flex;align-items:center;gap:10px;font-size:1.55rem;font-weight:700;letter-spacing:-.02em;margin:0 0 4px;color:var(--md-sys-color-on-surface)}.kn-page-sub{margin:0;font-size:.9rem;color:var(--md-sys-color-on-surface-variant)}.kn-overview-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}.kn-ch-card{display:flex;flex-direction:column;gap:12px;padding:20px;border-radius:var(--md-sys-shape-corner-large, 16px);background:var(--md-sys-color-surface-container-low);transition:transform .24s cubic-bezier(.22,1,.36,1),background-color .18s ease}.kn-ch-card:hover{transform:translateY(-2px);background:var(--md-sys-color-surface-container)}.kn-ch-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.kn-ch-card-title{margin:0;font-size:1.15rem;font-weight:700;letter-spacing:-.01em;color:var(--md-sys-color-on-surface)}.kn-ch-card-desc{margin:0;font-size:.875rem;line-height:1.65;color:var(--md-sys-color-on-surface-variant);flex:1}.kn-progress-track{width:100%;height:7px;border-radius:9999px;background:var(--md-sys-color-surface-container-highest);overflow:hidden}.kn-progress-fill{height:100%;border-radius:inherit;background:var(--md-sys-color-primary);transition:width .32s cubic-bezier(.22,1,.36,1)}.kn-ch-card-meta{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:.8rem;color:var(--md-sys-color-on-surface-variant)}.kn-ch-card-meta 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#e37400)}.kn-legend-line{width:20px;height:2.5px;border-radius:9999px;display:inline-block}.kn-legend-line.is-in{background:var(--m3-color-warning, #e37400)}.kn-legend-line.is-out{background:var(--md-sys-color-primary)}.kn-graph-backdrop{position:fixed;inset:0;background:#0a0e188f;backdrop-filter:blur(4px);z-index:1090}.kn-graph-card.is-fullscreen{position:fixed;inset:16px;z-index:1100;background:var(--md-sys-color-surface-container-low);border-radius:24px;padding:20px 24px;display:flex;flex-direction:column;box-shadow:0 24px 64px #00000047}.kn-graph-card.is-fullscreen .kn-graph-stage{flex:1;height:auto;min-height:0}.kn-surface-card{background:var(--md-sys-color-surface-container-low);border-radius:var(--md-sys-shape-corner-large, 16px);padding:22px 24px}.kn-hero-head{display:flex;align-items:flex-start;justify-content:space-between;flex-wrap:wrap;gap:16px}.kn-hero-badges{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:8px}.kn-hero-title{margin:0 0 8px;font-size:1.5rem;font-weight:700;letter-spacing:-.02em;color:var(--md-sys-color-on-surface)}.kn-hero-summary{margin:0;font-size:.92rem;line-height:1.72;max-width:74ch;color:var(--md-sys-color-on-surface-variant)}.kn-hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.kn-exam-callout{background:color-mix(in srgb,var(--m3-color-warning, #f9ab00) 13%,var(--md-sys-color-surface-container-low));border-radius:var(--md-sys-shape-corner-large, 16px);padding:18px 22px}.kn-exam-callout-title{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.96rem;color:var(--m3-color-warning, #b06000);margin-bottom:8px}.kn-exam-callout-body{font-size:.9rem;line-height:1.72;color:var(--md-sys-color-on-surface)}.kn-section-heading{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin:0 0 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16%,transparent)}.kn-search-clear{position:absolute;right:8px;width:24px;height:24px;border:none;border-radius:9999px;background:transparent;color:var(--md-sys-color-on-surface-variant);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;padding:0}.kn-search-clear:hover{background:color-mix(in srgb,var(--md-sys-color-on-surface) 10%,transparent)}.kn-status-chips{display:flex;align-items:center;flex-wrap:wrap;gap:6px}.kn-kp-list{display:flex;flex-direction:column;gap:12px}.kn-kp-card{display:flex;flex-direction:column;gap:10px;padding:18px 20px;border-radius:16px;background:var(--md-sys-color-surface-container-low);cursor:pointer;transition:transform .2s cubic-bezier(.22,1,.36,1),background-color .16s ease}.kn-kp-card:hover{transform:translateY(-1px);background:var(--md-sys-color-surface-container)}.kn-kp-card-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}.kn-kp-card-title-wrap{display:flex;align-items:center;flex-wrap:wrap;gap:8px;min-width:0}.kn-kp-id-badge{font-family:var(--font-mono, "JetBrains Mono", monospace);font-size:.76rem;font-weight:700;padding:3px 9px;border-radius:9999px;background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.kn-kp-card-title{margin:0;font-size:1.04rem;font-weight:700;color:var(--md-sys-color-on-surface)}.kn-stars{display:inline-flex;align-items:center;gap:1px;color:var(--m3-color-warning, #e37400)}.kn-stars .is-empty{color:var(--md-sys-color-outline-variant)}.kn-kp-card-right{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.kn-mark-pill{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:9999px;font-size:.76rem;font-weight:600}.kn-mark-pill.is-understood{background:color-mix(in srgb,var(--m3-color-success, #1e8e3e) 15%,transparent);color:var(--m3-color-success, #188038)}.kn-mark-pill.is-read{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.kn-mark-pill.is-review{background:color-mix(in srgb,var(--m3-color-warning, #f9ab00) 18%,transparent);color:var(--m3-color-warning, #b06000)}.kn-mark-pill.is-unread{background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface-variant)}.kn-kp-def-preview{font-size:.88rem;line-height:1.68;color:var(--md-sys-color-on-surface-variant)}.kn-kp-card-foot{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}.kn-kp-tags{display:flex;align-items:center;flex-wrap:wrap;gap:6px}.kn-kp-tag{font-size:.75rem;padding:2px 9px;border-radius:9999px;background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface-variant)}.kn-kp-demo-badge{display:inline-flex;align-items:center;gap:4px;font-size:.75rem;font-weight:600;padding:2px 9px;border-radius:9999px;background:var(--md-sys-color-tertiary-container, var(--md-sys-color-secondary-container));color:var(--md-sys-color-on-tertiary-container, var(--md-sys-color-on-secondary-container))}.kn-kp-quick-btns{display:flex;align-items:center;gap:6px}.kn-hf-list{display:flex;flex-direction:column;gap:8px}.kn-hf-row{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:12px 16px;border-radius:12px;background:var(--md-sys-color-surface-container);transition:background-color .15s ease}.kn-hf-row:hover{background:var(--md-sys-color-surface-container-high)}.kn-hf-left{display:flex;align-items:center;flex-wrap:wrap;gap:8px;min-width:0}.kn-hf-title{font-weight:600;font-size:.92rem;color:var(--md-sys-color-on-surface);text-decoration:none}.kn-hf-title:hover{color:var(--md-sys-color-primary)}.kn-hf-right{display:flex;align-items:center;gap:8px}.kn-sec-pager{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:8px}.kn-drawer-scrim{display:none}@media (max-width: 960px){.kn-mobile-bar{display:flex}.kn-layout{grid-template-columns:minmax(0,1fr)}.kn-sidebar{position:fixed;top:0;left:0;bottom:0;width:min(320px,86vw);max-height:100vh;border-radius:0 24px 24px 0;z-index:1050;padding:16px 12px;background:var(--md-sys-color-surface-container-low);transform:translate(-104%);transition:transform .28s cubic-bezier(.22,1,.36,1);box-shadow:0 16px 40px #0000003d}.kn-sidebar.is-open{transform:translate(0)}.kn-sidebar-head{display:flex}.kn-drawer-scrim.is-open{display:block;position:fixed;inset:0;background:#0a0e187a;z-index:1040}.kn-graph-stage{height:440px}}@media (prefers-reduced-motion: reduce){.kn-ch-card,.kn-sec-card,.kn-kp-card,.kn-tree-toggle,.kn-sidebar{transition:none!important}}.kp-page{width:100%;max-width:1280px;margin:0 auto}.kp-breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:.85rem;color:var(--md-sys-color-on-surface-variant);margin-bottom:16px}.kp-breadcrumb a{color:var(--md-sys-color-on-surface-variant);text-decoration:none;padding:3px 8px;border-radius:9999px;transition:background-color .15s ease,color .15s ease}.kp-breadcrumb a:hover{background:color-mix(in srgb,var(--md-sys-color-primary) 10%,transparent);color:var(--md-sys-color-primary)}.kp-breadcrumb-cur{font-weight:600;color:var(--md-sys-color-on-surface);padding:3px 6px}.kp-layout{display:grid;grid-template-columns:minmax(0,1fr) 232px;gap:28px;align-items:start}.kp-main{min-width:0;display:flex;flex-direction:column;gap:20px}.kp-hero-card{background:var(--md-sys-color-surface-container-low);border-radius:20px;padding:24px 28px;display:flex;flex-direction:column;gap:16px;scroll-margin-top:84px}.kp-hero-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}.kp-hero-meta{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.kp-id-pill{font-family:var(--font-mono, "JetBrains Mono", monospace);font-size:.8rem;font-weight:700;padding:4px 11px;border-radius:9999px;background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.kp-stars{display:inline-flex;align-items:center;gap:1px;color:var(--m3-color-warning, #e37400)}.kp-stars .is-empty{color:var(--md-sys-color-outline-variant)}.kp-tag-pill{font-size:.76rem;padding:3px 10px;border-radius:9999px;background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface-variant)}.kp-hero-top-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px}.kp-mastery-chip{display:inline-flex;align-items:center;gap:8px;padding:4px 12px 4px 6px;border-radius:9999px;background:var(--md-sys-color-surface-container);font-size:.82rem;font-weight:600;color:var(--md-sys-color-on-surface)}.kp-hero-title{margin:0;font-size:1.65rem;font-weight:750;letter-spacing:-.02em;line-height:1.32;color:var(--md-sys-color-on-surface)}.kp-hero-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:12px;border-top:1px solid color-mix(in srgb,var(--md-sys-color-outline-variant) 42%,transparent)}.kp-mark-switcher{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.kp-mark-label{font-size:.82rem;color:var(--md-sys-color-on-surface-variant);margin-right:2px}.kp-mark-btn{display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 14px;border-radius:9999px;border:1px solid color-mix(in srgb,var(--md-sys-color-outline-variant) 68%,transparent);background:var(--md-sys-color-surface-container-lowest, var(--md-sys-color-surface));color:var(--md-sys-color-on-surface-variant);font-size:.83rem;font-weight:600;cursor:pointer;transition:background-color .18s cubic-bezier(.2,0,0,1),color .18s cubic-bezier(.2,0,0,1),border-color .18s ease,transform .16s ease}.kp-mark-btn:hover{background:color-mix(in srgb,var(--md-sys-color-on-surface) 8%,transparent);color:var(--md-sys-color-on-surface)}.kp-mark-btn.is-active-read{border-color:transparent;background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.kp-mark-btn.is-active-understood{border-color:transparent;background:color-mix(in srgb,var(--m3-color-success, #1e8e3e) 18%,var(--md-sys-color-surface-container-low));color:var(--m3-color-success, #188038)}.kp-mark-btn.is-active-review{border-color:transparent;background:color-mix(in srgb,var(--m3-color-warning, #f9ab00) 22%,var(--md-sys-color-surface-container-low));color:var(--m3-color-warning, #b06000)}.kp-quick-jumps{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.kp-lecture-block{border-radius:18px;padding:22px 26px;scroll-margin-top:84px}.kp-lecture-block.is-definition{background:color-mix(in srgb,var(--md-sys-color-primary-container) 34%,var(--md-sys-color-surface-container-low))}.kp-lecture-block.is-theorem{background:color-mix(in srgb,var(--md-sys-color-tertiary-container, var(--md-sys-color-secondary-container)) 36%,var(--md-sys-color-surface-container-low))}.kp-lecture-block.is-explanation{background:var(--md-sys-color-surface-container-low)}.kp-lecture-block.is-pitfall{background:color-mix(in srgb,var(--m3-color-warning, #f9ab00) 14%,var(--md-sys-color-surface-container-low))}.kp-lecture-block.is-examples{background:var(--md-sys-color-surface-container-low)}.kp-block-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:14px}.kp-block-title{display:inline-flex;align-items:center;gap:9px;margin:0;font-size:1.05rem;font-weight:700;color:var(--md-sys-color-on-surface)}.kp-lecture-block.is-definition .kp-block-title{color:var(--md-sys-color-primary)}.kp-lecture-block.is-theorem .kp-block-title{color:var(--md-sys-color-tertiary, var(--md-sys-color-primary))}.kp-lecture-block.is-pitfall .kp-block-title{color:var(--m3-color-warning, #b06000)}.kp-prose{max-width:72ch;font-size:.96rem;line-height:1.78;color:var(--md-sys-color-on-surface)}.kp-prose .katex-display{overflow-x:auto;overflow-y:hidden;padding:6px 2px;margin:.85em 0}.kp-theorem-list,.kp-pitfall-list{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:12px}.kp-theorem-item,.kp-pitfall-item{line-height:1.78}.kp-proof-toggle-wrap{margin-top:8px}.kp-proof-box{margin-top:8px;padding:12px 16px;border-radius:12px;background:color-mix(in srgb,var(--md-sys-color-surface) 66%,transparent);font-size:.9rem;line-height:1.75}.kp-examples-list{display:flex;flex-direction:column;gap:14px}.kp-example-card{border-radius:14px;padding:18px 20px;background:var(--md-sys-color-surface-container);display:flex;flex-direction:column;gap:12px}.kp-example-q{display:flex;align-items:baseline;gap:10px;max-width:74ch;font-size:.95rem;line-height:1.76;color:var(--md-sys-color-on-surface)}.kp-example-badge{font-family:var(--font-mono, "JetBrains Mono", 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strong{color:var(--md-sys-color-primary);font-family:var(--font-mono);font-size:1.08rem;font-variant-numeric:tabular-nums}.prac-browser-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}.prac-browser-search{position:relative;flex:1;min-width:220px;max-width:420px}.prac-browser-search .m3-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--md-sys-color-on-surface-variant);pointer-events:none}.prac-browser-search .input{padding-left:38px}.prac-browser-list{display:flex;flex-direction:column;gap:10px}.prac-browser-item{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;padding:14px 18px;border-radius:var(--m3-radius-lg);background:var(--md-sys-color-surface-container);transition:background-color var(--m3-dur-fast) 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var(--m3-ease-spring)}.prac-kp-chip:hover{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.prac-kp-chip:active{transform:scale(.97)}.prac-diff-stars{display:inline-flex;align-items:center;gap:1px;padding:3px 9px;border-radius:var(--m3-radius-full);background:var(--md-sys-color-surface-container-high);color:var(--m3-color-warning)}.prac-diff-stars .is-dim{color:var(--md-sys-color-outline-variant)}.prac-live-timer{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:var(--m3-radius-full);background:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface);font-family:var(--font-mono);font-size:var(--fs-14);font-weight:700;font-variant-numeric:tabular-nums}.prac-palette-bar{display:flex;align-items:center;gap:8px;overflow-x:auto;padding:4px 2px 2px;scrollbar-width:thin}.prac-palette-pill{position:relative;flex-shrink:0;min-width:34px;height:32px;padding:0 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10px;border-radius:var(--m3-radius-lg);border:1.5px solid transparent;background:var(--md-sys-color-surface-container);color:var(--md-sys-color-on-surface);cursor:pointer;min-width:106px;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth),border-color var(--m3-dur-fast) var(--m3-ease-smooth),transform var(--m3-dur-short) var(--m3-ease-spring)}.settings-seed-swatch:hover{background:var(--md-sys-color-surface-container-high);transform:translateY(-1px)}.settings-seed-swatch.is-active{border-color:var(--md-sys-color-primary);background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.settings-seed-circle{position:relative;width:40px;height:40px;border-radius:50%;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;box-shadow:inset 0 0 0 1px #0000001a}.settings-seed-check{color:#fff;display:inline-flex;align-items:center;justify-content:center;filter:drop-shadow(0 1px 2px rgba(0,0,0,.3))}.settings-seed-name{font-size:var(--fs-12);font-weight:650;white-space:nowrap}.settings-live-preview{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-lg);padding:var(--card-pad, 18px);display:flex;flex-direction:column;gap:8px}.settings-live-preview-head{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;font-size:var(--fs-12);font-weight:700;color:var(--md-sys-color-primary)}.settings-slider-control{display:inline-flex;align-items:center;gap:12px;min-width:260px;flex:1;max-width:340px;justify-content:flex-end}.settings-slider-control input[type=range]{flex:1;min-width:130px}.settings-num-input{width:74px!important;height:36px!important;text-align:center;font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:700;padding:4px 8px!important}.settings-data-pills{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;width:100%}@media (max-width: 767px){.settings-data-pills{grid-template-columns:repeat(2,minmax(0,1fr))}}.settings-data-pill{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-md);padding:10px 12px;display:flex;flex-direction:column;gap:3px}.settings-data-pill-label{font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant)}.settings-data-pill-val{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:1.2rem;font-weight:700;color:var(--md-sys-color-on-surface)}.settings-shortcuts-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 18px;width:100%}@media (max-width: 640px){.settings-shortcuts-grid{grid-template-columns:1fr}}.settings-shortcut-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 12px;border-radius:var(--m3-radius-md);background:var(--md-sys-color-surface-container);font-size:var(--fs-13)}.settings-kbd{display:inline-flex;align-items:center;justify-content:center;padding:2px 9px;border-radius:7px;background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-family:var(--font-mono);font-size:var(--fs-12);font-weight:650}.stats-page{display:flex;flex-direction:column;gap:var(--section-gap, 20px);padding-bottom:28px}.stats-kpi-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}@media (min-width: 1280px){.stats-kpi-grid{grid-template-columns:repeat(6,minmax(0,1fr))}}@media (max-width: 767px){.stats-kpi-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}}.stats-kpi-card{background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus);padding:16px 18px;display:flex;flex-direction:column;justify-content:space-between;gap:10px;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth),transform var(--m3-dur-short) var(--m3-ease-spring)}.stats-kpi-card.is-clickable{cursor:pointer}.stats-kpi-card.is-clickable:hover{background:var(--md-sys-color-surface-container);transform:translateY(-2px)}.stats-kpi-top{display:flex;align-items:center;justify-content:space-between;gap:8px}.stats-kpi-label{font-size:var(--fs-13);font-weight:600;color:var(--md-sys-color-on-surface-variant)}.stats-kpi-icon{width:34px;height:34px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.stats-kpi-icon.tone-primary{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.stats-kpi-icon.tone-secondary{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.stats-kpi-icon.tone-tertiary{background:var(--md-sys-color-tertiary-container);color:var(--md-sys-color-on-tertiary-container)}.stats-kpi-icon.tone-success{background:var(--m3-color-success-container);color:var(--m3-color-on-success-container)}.stats-kpi-icon.tone-warning{background:var(--m3-color-warning-container);color:var(--m3-color-on-warning-container)}.stats-kpi-icon.tone-error{background:var(--m3-color-error-container);color:var(--m3-color-on-error-container)}.stats-kpi-val{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:1.55rem;font-weight:700;line-height:1.18;color:var(--md-sys-color-on-surface);letter-spacing:-.02em}.stats-kpi-sub{font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant);line-height:1.4}.stats-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}.stats-card-title{display:inline-flex;align-items:center;gap:8px;font-size:1.04rem;font-weight:700;color:var(--md-sys-color-on-surface);margin:0}.stats-card-desc{font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant);margin-top:3px}.stats-cal-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:10px;padding-top:10px;border-top:1px solid var(--md-sys-color-outline-variant);font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant)}.stats-cal-legend{display:inline-flex;align-items:center;gap:5px}.stats-cal-dot{width:12px;height:12px;border-radius:4px;display:inline-block}.stats-radar-split{display:grid;grid-template-columns:minmax(260px,.95fr) minmax(0,1.25fr);gap:18px;align-items:center}@media (max-width: 959px){.stats-radar-split{grid-template-columns:1fr}}.stats-chapter-list{display:flex;flex-direction:column;gap:10px}.stats-chapter-row{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-md);padding:12px 14px;display:flex;flex-direction:column;gap:8px;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth)}.stats-chapter-row:hover{background:var(--md-sys-color-surface-container-high)}.stats-chapter-row-top{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.stats-chapter-name{font-size:var(--fs-14);font-weight:650;color:var(--md-sys-color-on-surface)}.stats-chapter-meta{display:inline-flex;align-items:center;gap:8px;font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant)}.stats-hm-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}.stats-hm-legend{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant)}.stats-hm-legend-item{display:inline-flex;align-items:center;gap:5px}.stats-hm-swatch{width:13px;height:13px;border-radius:4px;display:inline-block}.stats-hm-swatch.lv-none{background:var(--md-sys-color-surface-container-highest)}.stats-hm-swatch.lv-low{background:var(--m3-color-error-container)}.stats-hm-swatch.lv-mid{background:var(--m3-color-warning-container)}.stats-hm-swatch.lv-high{background:var(--m3-color-success-container)}.stats-hm-swatch.lv-master{background:var(--m3-color-success)}.stats-hm-chapters{display:flex;flex-direction:column;gap:14px}.stats-hm-chapter{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-lg);padding:14px 16px}.stats-hm-ch-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding-bottom:10px;margin-bottom:12px;border-bottom:1px solid var(--md-sys-color-outline-variant)}.stats-hm-ch-title{display:inline-flex;align-items:center;gap:8px;font-size:var(--fs-15, .96rem);font-weight:700;color:var(--md-sys-color-on-surface)}.stats-hm-sec-block+.stats-hm-sec-block{margin-top:12px}.stats-hm-sec-head{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:var(--fs-12);font-weight:600;color:var(--md-sys-color-on-surface-variant);margin-bottom:7px}.stats-hm-tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(148px,1fr));gap:8px}.stats-kp-tile{border:none;border-radius:var(--m3-radius-md);padding:9px 11px;text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:3px;transition:transform var(--m3-dur-short) var(--m3-ease-spring),border-radius var(--m3-dur-short) var(--m3-ease-standard),filter var(--m3-dur-fast) var(--m3-ease-smooth)}.stats-kp-tile:hover{transform:translateY(-2px);filter:brightness(.97)}.stats-kp-tile:active{transform:scale(.98)}.stats-kp-tile.lv-none{background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface-variant)}.stats-kp-tile.lv-low{background:var(--m3-color-error-container);color:var(--m3-color-on-error-container)}.stats-kp-tile.lv-mid{background:var(--m3-color-warning-container);color:var(--m3-color-on-warning-container)}.stats-kp-tile.lv-high{background:var(--m3-color-success-container);color:var(--m3-color-on-success-container)}.stats-kp-tile.lv-master{background:color-mix(in srgb,var(--m3-color-success) 26%,var(--m3-color-success-container));color:var(--m3-color-on-success-container)}.stats-kp-tile-top{display:flex;align-items:center;justify-content:space-between;gap:6px;font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:.74rem;font-weight:700}.stats-kp-tile-name{font-size:var(--fs-12);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.stats-kp-floating-tip{position:fixed;z-index:980;pointer-events:none;width:276px;padding:12px 14px;border-radius:var(--m3-radius-lg);background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);box-shadow:var(--m3-elevation-float);font-size:var(--fs-12);line-height:1.55}.stats-stars{display:inline-flex;align-items:center;gap:1px;color:var(--m3-color-warning);vertical-align:middle}.stats-stars .is-dim{color:var(--md-sys-color-outline-variant)}.stats-weak-list,.stats-exam-list{display:flex;flex-direction:column;gap:10px}.stats-weak-item,.stats-exam-item{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-lg);padding:13px 16px;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;transition:background-color var(--m3-dur-fast) var(--m3-ease-smooth)}.stats-weak-item:hover,.stats-exam-item:hover{background:var(--md-sys-color-surface-container-high)}.stats-weak-rank{width:28px;height:28px;border-radius:var(--m3-radius-full);background:var(--m3-color-error-container);color:var(--m3-color-on-error-container);font-family:var(--font-mono);font-size:var(--fs-13);font-weight:700;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.stats-weak-rank.is-fallback{background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.stats-weak-info{flex:1;min-width:200px}.stats-weak-title{display:flex;align-items:center;gap:7px;flex-wrap:wrap;font-size:var(--fs-14);font-weight:650;color:var(--md-sys-color-on-surface);margin-bottom:4px}.stats-weak-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant)}.stats-weak-actions{display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap}.stats-exam-summary-pills{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:12px}.stats-exam-pill{background:var(--md-sys-color-surface-container);border-radius:var(--m3-radius-md);padding:10px 12px;display:flex;flex-direction:column;gap:2px}.stats-exam-pill-label{font-size:var(--fs-12);color:var(--md-sys-color-on-surface-variant)}.stats-exam-pill-val{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:1.15rem;font-weight:700;color:var(--md-sys-color-on-surface)}.m3-wb-page{display:flex;flex-direction:column;gap:18px;padding-bottom:36px}.m3-wb-header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.m3-wb-title-block{display:flex;flex-direction:column;gap:4px}.m3-wb-title{display:inline-flex;align-items:center;gap:10px;margin:0;font-size:1.4rem;font-weight:750;color:var(--md-sys-color-on-surface)}.m3-wb-title .m3-icon{color:var(--md-sys-color-primary)}.m3-wb-subtitle{margin:0;font-size:.88rem;color:var(--md-sys-color-on-surface-variant)}.m3-wb-stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.m3-wb-stat-card{position:relative;overflow:hidden;background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus, 20px);padding:18px 20px;display:flex;flex-direction:column;justify-content:space-between;gap:8px;cursor:pointer;border:1.5px solid transparent;text-align:left;transition:background-color var(--m3-dur-fast, .15s) ease,border-color var(--m3-dur-fast, .15s) ease,transform var(--m3-dur-short, .2s) var(--m3-ease-spring, cubic-bezier(.34, 1.45, .64, 1))}.m3-wb-stat-card:hover{background:var(--md-sys-color-surface-container);transform:translateY(-2px)}.m3-wb-stat-card.is-active{background:color-mix(in srgb,var(--md-sys-color-secondary-container) 45%,var(--md-sys-color-surface-container));border-color:var(--md-sys-color-primary)}.m3-wb-stat-card.is-due-card{background:color-mix(in srgb,var(--md-sys-color-primary-container) 34%,var(--md-sys-color-surface-container-low))}.m3-wb-stat-top{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:.85rem;font-weight:650;color:var(--md-sys-color-on-surface-variant)}.m3-wb-stat-label{display:inline-flex;align-items:center;gap:6px}.m3-wb-stat-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:1.85rem;font-weight:800;line-height:1.1}.m3-wb-stat-foot{font-size:.79rem;color:var(--md-sys-color-on-surface-variant)}.m3-wb-filter-card{background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus, 20px);padding:18px 20px;display:flex;flex-direction:column;gap:14px}.m3-wb-filters-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}.m3-wb-select{width:100%;height:38px;padding:0 12px;border-radius:12px;border:1.5px solid transparent;background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-size:.85rem;font-weight:550;cursor:pointer;transition:border-color .15s ease,background-color .15s ease}.m3-wb-select:focus{outline:none;border-color:var(--md-sys-color-primary)}.m3-wb-batch-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:12px;border-top:1px solid var(--md-sys-color-outline-variant)}.m3-wb-check-label{display:inline-flex;align-items:center;gap:8px;font-size:.87rem;color:var(--md-sys-color-on-surface);cursor:pointer;user-select:none}.m3-wb-checkbox{width:17px;height:17px;accent-color:var(--md-sys-color-primary);cursor:pointer}.m3-wb-list{display:flex;flex-direction:column;gap:14px}.m3-wb-card{position:relative;background:var(--md-sys-color-surface-container-low);border-radius:var(--m3-radius-lg-plus, 20px);padding:20px 22px;display:flex;flex-direction:column;gap:14px;border:1.5px solid transparent;transition:background-color .2s ease,border-color .24s ease,transform .24s var(--m3-ease-spring)}.m3-wb-card.is-celebrating{animation:m3WbMasteryPulse .95s var(--m3-ease-spring, cubic-bezier(.34, 1.45, .64, 1));border-color:var(--m3-color-success);background:color-mix(in srgb,var(--m3-color-success-container) 42%,var(--md-sys-color-surface-container-low))}@keyframes m3WbMasteryPulse{0%{transform:scale(.992)}38%{transform:scale(1.012)}to{transform:scale(1)}}.m3-wb-celebrate-pill{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:999px;background:var(--m3-color-success);color:var(--m3-color-on-success);font-size:.78rem;font-weight:700;animation:m3WbBadgePop .38s var(--m3-ease-spring) both}@keyframes m3WbBadgePop{0%{opacity:0;transform:scale(.65) translateY(4px)}to{opacity:1;transform:scale(1) translateY(0)}}.m3-wb-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.m3-wb-badges{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.m3-wb-qid{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:.92rem;font-weight:750;color:var(--md-sys-color-on-surface)}.m3-wb-stem{font-size:1.02rem;line-height:1.82;color:var(--md-sys-color-on-surface);overflow-x:auto}.m3-wb-options-preview{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px;padding:10px 14px;border-radius:14px;background:var(--md-sys-color-surface-container);font-size:.9rem;color:var(--md-sys-color-on-surface-variant)}.m3-wb-opt-cell{display:flex;align-items:baseline;gap:6px;min-width:0;overflow-x:auto}.m3-wb-opt-letter{font-family:var(--font-mono);font-weight:700;color:var(--md-sys-color-primary);flex-shrink:0}.m3-wb-reasons-bar{display:flex;align-items:center;gap:7px;flex-wrap:wrap;font-size:.82rem;color:var(--md-sys-color-on-surface-variant)}.m3-wb-reason-label{display:inline-flex;align-items:center;gap:4px;font-weight:600}.m3-wb-reason-chip{display:inline-flex;align-items:center;gap:4px;height:28px;padding:0 11px;border-radius:999px;border:1px solid var(--md-sys-color-outline-variant);background:transparent;color:var(--md-sys-color-on-surface-variant);font-size:.78rem;font-weight:600;cursor:pointer;transition:background-color .14s ease,color .14s ease,border-color .14s ease,transform .16s var(--m3-ease-spring)}.m3-wb-reason-chip:hover{border-color:var(--md-sys-color-primary);color:var(--md-sys-color-on-surface)}.m3-wb-reason-chip:active{transform:scale(.95)}.m3-wb-reason-chip.is-on{background:var(--md-sys-color-secondary-container);border-color:transparent;color:var(--md-sys-color-on-secondary-container)}.m3-wb-custom-reason-form{display:inline-flex;align-items:center;gap:5px}.m3-wb-custom-reason-input{height:28px;width:132px;padding:0 10px;border-radius:999px;border:1px solid var(--md-sys-color-primary);background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-size:.78rem}.m3-wb-custom-reason-input:focus{outline:none}.m3-wb-action-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding-top:6px}.m3-wb-meta-hint{display:inline-flex;align-items:center;gap:6px;font-size:.8rem;color:var(--md-sys-color-on-surface-variant);font-variant-numeric:tabular-nums}.m3-wb-reveal-panel{border-radius:16px;padding:16px 18px;background:var(--md-sys-color-surface-container);display:flex;flex-direction:column;gap:12px}.m3-wb-past-wrong-strip{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:10px 14px;border-radius:12px;background:color-mix(in srgb,var(--m3-color-error-container) 45%,var(--md-sys-color-surface-container-low));font-size:.86rem}.m3-wb-sol-steps{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px;line-height:1.78}.m3-wb-redo-stage{max-width:880px;width:100%;margin:0 auto;display:flex;flex-direction:column;gap:16px}.m3-wb-redo-nav-strip{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:12px 16px;border-radius:18px;background:var(--md-sys-color-surface-container-low)}.m3-wb-redo-dot{min-width:34px;height:32px;padding:0 8px;border-radius:10px;border:none;background:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface);font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:.78rem;font-weight:700;cursor:pointer;transition:transform .16s var(--m3-ease-spring),background-color .15s ease}.m3-wb-redo-dot.is-current{background:var(--md-sys-color-primary);color:var(--md-sys-color-on-primary)}.m3-wb-redo-dot.is-done-ok{background:var(--m3-color-success-container);color:var(--m3-color-on-success-container)}.m3-wb-redo-dot.is-done-err{background:var(--m3-color-error-container);color:var(--m3-color-on-error-container)}.m3-wb-redo-widget{border-radius:18px;padding:18px 20px;background:var(--md-sys-color-surface-container);display:flex;flex-direction:column;gap:14px}.m3-wb-fill-row{display:flex;flex-direction:column;gap:6px}.m3-wb-fill-preview{min-height:30px;padding:6px 12px;border-radius:10px;background:var(--md-sys-color-surface-container-low);font-size:.88rem;color:var(--md-sys-color-on-surface-variant);display:flex;align-items:center;gap:8px;overflow-x:auto}.m3-wb-rubric-item{display:flex;align-items:flex-start;gap:10px;padding:10px 14px;border-radius:12px;background:var(--md-sys-color-surface-container-low);cursor:pointer;font-size:.9rem;line-height:1.65}.m3-wb-judge-banner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:12px 16px;border-radius:14px;font-weight:650}.m3-wb-judge-banner.is-ok{background:var(--m3-color-success-container);color:var(--m3-color-on-success-container)}.m3-wb-judge-banner.is-err{background:var(--m3-color-error-container);color:var(--m3-color-on-error-container)}@media (max-width: 980px){.m3-wb-stats-grid,.m3-wb-filters-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 600px){.m3-wb-filters-grid{grid-template-columns:1fr}.m3-wb-card{padding:16px}}