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.key-point__head>strong{min-width:0;font-size:var(--text-sm);line-height:var(--leading-snug)}.review-quiz-group__unavailable{padding-inline:var(--space-3);color:var(--color-ink-muted);font-size:var(--text-xs)}.key-point__trap.review-answer>span:first-child{background:var(--color-success-soft);color:var(--color-success)}.review-outcome{flex:0 0 auto;padding:0 var(--space-2);border-radius:var(--radius-pill);font-size:var(--text-xs);line-height:1.5}.review-outcome.is-wrong{background:var(--color-danger-soft);color:var(--color-danger)}.review-outcome.is-confusing{background:var(--color-warning-soft);color:var(--color-warning-ink)}.review-outcome.is-correct{background:var(--color-success-soft);color:var(--color-success)}:root{color-scheme:light;--color-canvas: #ffffff;--color-canvas-deep: #f0f0f0;--color-surface: #ffffff;--color-surface-muted: #f4f4f4;--color-sidebar: #f9f9f9;--color-sidebar-hover: rgb(0 0 0 / .05);--color-sidebar-active: rgb(0 0 0 / .08);--color-ink: #0d0d0d;--color-brand-ink: #0d0d0d;--color-ink-soft: #5d5d5d;--color-ink-muted: #6e6e6e;--color-border: rgb(0 0 0 / .1);--color-surface-lift: rgb(255 255 255 / .55);--color-border-strong: rgb(0 0 0 / .16);--color-accent: #4255ff;--color-accent-strong: #423ed8;--color-accent-soft: #eef0ff;--color-accent-overlay: rgb(255 255 255 / .2);--color-success: #0b7f59;--color-success-soft: #e6f7f0;--color-warning: #ffcd1f;--color-star: #f59e0b;--color-highlight: #efe7fd;--color-highlight-ink: #4c1d95;--color-warning-ink: #7c6200;--color-warning-soft: #fff7da;--color-danger: #c7253f;--color-danger-soft: #ffeef0;--color-google-button: #ffffff;--color-google-button-hover: #f5f5f5;--color-google-button-ink: #1f1f1f;--color-overlay: rgb(13 13 13 / .56);--color-focus: rgb(66 85 255 / .22);--color-transparent: transparent;--font-body: ui-sans-serif, -apple-system, BlinkMacSystemFont, "system-ui", Pretendard, "Apple SD Gothic Neo", "Segoe UI", "Noto Sans KR", Helvetica, Arial, sans-serif;--font-display: 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.375rem;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-pill: 999rem;--stroke: .0625rem;--stroke-strong: .125rem;--shadow-soft: 0 .0625rem .1875rem rgb(13 13 13 / .1);--shadow-floating: 0 .75rem 2rem rgb(13 13 13 / .12);--shadow-popover: 0 .25rem .75rem rgb(13 13 13 / .14), 0 .0625rem .1875rem rgb(13 13 13 / .1);--shadow-top: 0 -.5rem 1.5rem rgb(13 13 13 / .05);--ring-hairline: 0 0 0 var(--stroke) var(--color-border);--focus-ring: var(--stroke-strong) solid var(--color-accent);--motion-instant: 1ms;--motion-quick: .12s;--motion-base: .16s;--motion-slow: .22s;--sidebar-width: 16.25rem;--sidebar-collapsed-width: 3.5rem;--content-width: 63.75rem;--reading-width: 52rem;--thumbnail-width: 7rem;--page-thumbnail-width: 20rem;--document-cover-min-width: 13rem;--folder-cover-min-width: 15rem;--folder-preview-width: 42%;--folder-preview-max-height: 7.75rem;--folder-preview-angle-start: -3deg;--folder-preview-angle-middle: 2deg;--folder-preview-angle-end: 5deg;--linked-document-max-width: 14rem;--set-card-min-width: 17.5rem;--set-card-min-height: 13rem;--action-menu-min-width: 12rem;--control-height-xs: 1.8rem;--control-height-sm: 2.75rem;--control-height: 2.75rem;--control-height-lg: 3.15rem;--tap-target: 2.75rem;--icon-sm: 1rem;--icon-md: 1.2rem;--icon-lg: 1.6rem;--safe-area-top: env(safe-area-inset-top, 0px);--safe-area-bottom: env(safe-area-inset-bottom, 0px);--color-bar: var(--color-surface);--bottom-nav-height: calc(var(--control-height-lg) + var(--safe-area-bottom));--layer-quiz-focus: 25;--layer-menu: 40}@media(prefers-color-scheme:dark){:root{color-scheme:dark;--color-canvas: #212121;--color-canvas-deep: #2f2f2f;--color-surface: #2a2a2a;--color-surface-muted: #303030;--color-sidebar: #171717;--color-sidebar-hover: rgb(255 255 255 / .08);--color-sidebar-active: rgb(255 255 255 / .13);--color-ink: #ffffff;--color-brand-ink: #ffffff;--color-ink-soft: #cdcdcd;--color-ink-muted: #afafaf;--color-border: rgb(255 255 255 / .13);--color-surface-lift: rgb(255 255 255 / .08);--color-border-strong: rgb(255 255 255 / .22);--color-accent: #7c89ff;--color-accent-strong: #aab2ff;--color-accent-soft: #2c3163;--color-accent-overlay: rgb(0 0 0 / .16);--color-success: #57d7aa;--color-success-soft: #173a31;--color-warning: #ffd95e;--color-star: #fbbf24;--color-highlight: #443068;--color-highlight-ink: #f0e9ff;--color-warning-ink: #ffe797;--color-warning-soft: #3a3218;--color-danger: #ff7d8d;--color-danger-soft: #482129;--color-overlay: rgb(0 0 0 / .72);--color-focus: rgb(124 137 255 / .32);--shadow-soft: 0 .125rem .5rem rgb(0 0 0 / .24);--shadow-floating: 0 .75rem 2rem rgb(0 0 0 / .4);--shadow-popover: 0 .25rem .75rem rgb(0 0 0 / .45), 0 .0625rem .1875rem rgb(0 0 0 / .35);--shadow-top: 0 -.5rem 1.5rem rgb(0 0 0 / .24)}}@media(prefers-contrast:more){:root{--color-ink-soft: var(--color-ink);--color-ink-muted: var(--color-ink-soft);--color-border: var(--color-border-strong);--stroke: .09375rem}}*{box-sizing:border-box}html{background:var(--color-canvas);color:var(--color-ink);font-family:var(--font-body);scroll-behavior:smooth}body{margin:0;min-width:0;min-height:100vh;min-height:100dvh;background:var(--color-canvas);color:var(--color-ink);font-size:var(--text-base);line-height:var(--leading-body);text-rendering:optimizeLegibility;word-break:keep-all;overflow-wrap:break-word}button,input,textarea,select{color:inherit;font:inherit}button,summary,select{cursor:pointer}button:disabled,select:disabled,input:disabled,textarea:disabled{cursor:not-allowed}a{color:inherit;text-decoration:none}img,svg{display:block}h1,h2,h3,h4,h5,h6,p,dl,dd,ol{margin:0}h1,h2,h3,h4,h5,h6,strong,b,th{font-weight:var(--weight-semibold)}:focus-visible{outline:var(--stroke-strong) solid var(--color-accent);outline-offset:var(--space-1);box-shadow:0 0 0 var(--space-1) 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.sidebar__collapse{opacity:1}.brand{display:inline-flex;align-items:center;gap:var(--space-2);font-weight:var(--weight-semibold);letter-spacing:-.03125rem}.brand__mark{width:var(--icon-lg);height:var(--icon-lg);flex:0 0 var(--icon-lg)}.brand__word{color:var(--color-accent);font-size:var(--text-lg)}.brand__word span{color:var(--color-brand-ink)}.brand--compact{gap:var(--space-1)}.brand--compact .brand__mark{width:var(--icon-md);height:var(--icon-md);flex-basis:var(--icon-md)}.brand--compact .brand__word{font-size:var(--text-md)}.sidebar__nav{display:flex;flex-direction:column;gap:var(--space-1)}.nav-link{display:flex;width:100%;align-items:center;gap:var(--space-2);min-height:2.25rem;padding:0 var(--space-2);border:0;border-radius:var(--radius-sm);background:var(--color-transparent);color:var(--color-ink);font-size:var(--text-sm);font-weight:var(--weight-regular);line-height:var(--leading-snug);text-align:start;transition:background-color var(--motion-base) ease}.nav-link svg{width:1.125rem;height:1.125rem;flex:0 0 1.125rem;color:var(--color-ink-soft)}.nav-link:hover{background:var(--color-sidebar-hover)}.nav-link.is-active{background:var(--color-sidebar-active);color:var(--color-ink)}.nav-link.is-active svg{color:var(--color-ink)}.sidebar__recent{display:flex;min-height:0;flex-direction:column;margin-top:var(--space-5)}.sidebar__section-label{padding:0 var(--space-2) var(--space-1);color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-regular)}.sidebar__recent-list{display:flex;overflow-y:auto;min-height:0;flex-direction:column;gap:var(--space-1);scrollbar-width:thin}.sidebar__recent-link{display:flex;min-width:0;align-items:center;gap:var(--space-2);padding:var(--space-2);border-radius:var(--radius-sm);color:var(--color-ink);font-size:var(--text-sm);line-height:var(--leading-snug);transition:background-color var(--motion-base) ease}.sidebar__recent-name{overflow:hidden;min-width:0;flex:1 1 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auto;padding:var(--space-8) var(--space-8) var(--space-11)}.ui-action-menu.mobile-account-action,.bottom-nav{display:none}.page-stack{display:flex;flex-direction:column;gap:var(--space-8)}.standalone-state,.standalone-page{display:grid;min-height:100vh;place-content:center;gap:var(--space-6);padding:var(--space-7)}.standalone-state>.brand{justify-self:center}.ui-button,.btn{display:inline-flex;min-height:var(--control-height);align-items:center;justify-content:center;gap:var(--space-2);padding:0 var(--space-4);border:var(--stroke) solid var(--color-transparent);border-radius:var(--radius-pill);background:var(--color-accent);color:var(--color-surface);font-size:var(--text-sm);font-weight:var(--weight-medium);line-height:1;transition:transform .12s ease,background-color .16s ease,border-color .16s ease}.ui-button svg,.btn 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.ui-button--ghost:hover{background:var(--color-sidebar-hover);color:var(--color-ink)}.ui-button--danger,.btn.danger{border-color:var(--color-danger-soft);background:var(--color-danger-soft);color:var(--color-danger)}.ui-button--danger:hover,.btn.danger:hover{border-color:var(--color-danger);background:var(--color-danger);color:var(--color-surface)}.ui-button--google{width:100%;border:var(--stroke) solid var(--color-border-strong);border-radius:var(--radius-pill);background:var(--color-google-button);color:var(--color-google-button-ink);font-family:var(--font-google);box-shadow:none}.ui-button--google:hover{background:var(--color-google-button-hover)}.ui-google-button__logo{width:var(--icon-md);height:var(--icon-md);object-fit:contain}.ui-button--xs,.btn.small{min-height:var(--tap-target);padding:0 var(--space-3);font-size:var(--text-xs)}.ui-button--sm{min-height:2.25rem;padding:0 var(--space-3)}.ui-button--lg,.btn.big{min-height:var(--control-height-lg);padding:0 var(--space-6);font-size:var(--text-base)}.ui-button--icon,.icon-btn{width:var(--tap-target);min-width:var(--tap-target);min-height:var(--tap-target);padding:0}.ui-action-menu{position:relative;display:inline-flex}.ui-action-menu__trigger{color:var(--color-ink-soft);font-weight:var(--weight-medium)}.ui-action-menu__trigger:has(.ui-action-menu__chevron){border-color:var(--color-border);border-radius:var(--radius-pill);color:var(--color-ink)}.ui-action-menu__trigger:has(.ui-action-menu__chevron):hover{background:var(--color-surface-muted)}.ui-action-menu__trigger .ui-action-menu__chevron{transition:transform var(--motion-quick) ease}.ui-action-menu__trigger[aria-expanded=true] .ui-action-menu__chevron{transform:rotate(180deg)}.ui-action-menu__more{width:var(--icon-md);height:var(--icon-md)}@keyframes ui-popover-in{0%{opacity:0;scale:.96}to{opacity:1;scale:1}}@keyframes ui-popover-out{0%{opacity:1;scale:1}to{opacity:0;scale:.98}}.ui-popover-motion{animation:ui-popover-in var(--motion-quick) cubic-bezier(.2,0,0,1) both;transform-origin:var(--popover-origin, top center)}.ui-popover-motion.is-closing{animation:ui-popover-out 90ms ease both;pointer-events:none}@media(prefers-reduced-motion:reduce){.ui-popover-motion,.ui-popover-motion.is-closing{animation:none}}.ui-action-menu__popover{--popover-origin: top right;position:fixed;z-index:var(--layer-menu);display:grid;width:max-content;min-width:min(var(--action-menu-min-width),calc(100vw - var(--space-4)));max-width:calc(100vw - var(--space-4));gap:var(--space-1);padding:var(--space-2);border-radius:var(--radius-md);background:var(--color-surface);box-shadow:var(--shadow-popover)}.ui-action-menu__item{display:flex;width:100%;min-height:var(--tap-target);align-items:center;gap:var(--space-2);padding:0 var(--space-3);border:0;border-radius:var(--radius-sm);background:var(--color-transparent);color:var(--color-ink);font-size:var(--text-sm);font-weight:var(--weight-regular);text-align:left;white-space:nowrap}.ui-action-menu__item:hover,.ui-action-menu__item:focus-visible{background:var(--color-surface-muted)}.ui-action-menu__item.is-destructive{color:var(--color-danger)}.ui-action-menu__item.is-destructive:hover,.ui-action-menu__item.is-destructive:focus-visible{background:var(--color-danger-soft)}.ui-action-menu__item:disabled{opacity:.48}.ui-action-menu__item svg{width:var(--icon-sm);height:var(--icon-sm)}.ui-input,.input,.select,.page-input{width:100%;min-height:var(--control-height);padding:0 var(--space-3);border:var(--stroke) solid var(--color-transparent);border-radius:var(--radius-sm);outline:0;background:var(--color-surface-muted);color:var(--color-ink);transition:border-color .16s ease,box-shadow .16s 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b{color:var(--color-ink);font-weight:var(--weight-medium)}.setup-group .ui-textarea{font-size:var(--type-body-size);line-height:var(--leading-body);padding:var(--space-3);resize:none}@media(pointer:coarse){.setup-group .ui-textarea{font-size:var(--text-base)}}.setup-stars{display:flex;gap:var(--space-1)}.setup-star{display:grid;padding:0;border:0;background:var(--color-transparent);color:var(--color-border-strong);cursor:pointer;place-items:center}.setup-star svg{width:var(--icon-md);height:var(--icon-md);fill:currentcolor}.setup-star.is-filled{color:var(--color-star)}.reference-picker{display:flex;overflow-y:auto;max-height:24rem;flex-direction:column;gap:var(--space-2)}.reference-picker__item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-2);border:var(--stroke) solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:border-color var(--motion-base) ease,background-color var(--motion-base) ease}.reference-picker__item:hover{background:var(--color-surface-muted)}.reference-picker__item.is-selected{border-color:var(--color-accent);background:var(--color-accent-soft)}.reference-picker__item input{position:absolute;width:var(--stroke);height:var(--stroke);opacity:0}.reference-picker__item--none{width:100%;background:var(--color-transparent);text-align:start}.reference-picker__none-mark{display:grid;flex:0 0 2.25rem;width:2.25rem;height:2.25rem;place-items:center;border-radius:var(--radius-xs);background:var(--color-surface-muted);color:var(--color-ink-muted)}.reference-picker__none-mark svg{width:var(--icon-md);height:var(--icon-md)}.document-thumbnail--picker{width:4.5rem;flex:0 0 4.5rem;border-radius:var(--radius-xs)}.reference-picker__copy{display:flex;min-width:0;flex:1 1 auto;flex-direction:column}.reference-picker__copy strong{overflow:hidden;font-size:var(--text-sm);font-weight:var(--weight-medium);text-overflow:ellipsis;white-space:nowrap}.reference-picker__copy small{color:var(--color-ink-muted);font-size:var(--text-xs)}.reference-picker__check{width:var(--icon-md);height:var(--icon-md);flex:0 0 var(--icon-md);color:var(--color-accent)}.feedback-dialog{display:flex;flex-direction:column;gap:var(--space-1)}.feedback-dialog__count{align-self:flex-end;color:var(--color-ink-muted);font-size:var(--text-xs)}.feedback-dialog__error{color:var(--color-danger);font-size:var(--text-sm)}.feedback-dialog__sent{display:flex;align-items:center;gap:var(--space-2);color:var(--color-ink-soft);font-size:var(--text-sm)}.feedback-dialog__sent svg{width:var(--icon-md);height:var(--icon-md);color:var(--color-success)}.library-kind-confirm{display:flex;align-items:flex-start;gap:var(--space-4)}.document-thumbnail--kind-confirm{width:5.5rem;flex:0 0 5.5rem;border-radius:var(--radius-sm)}.library-kind-confirm__copy{display:flex;min-width:0;flex-direction:column;gap:var(--space-2)}.library-kind-confirm__copy strong{overflow:hidden;font-size:var(--text-sm);font-weight:var(--weight-medium);text-overflow:ellipsis}.library-kind-confirm__copy p{color:var(--color-ink-soft);font-size:var(--text-sm);line-height:var(--leading-body)}.kind-emphasis{font-style:normal;font-weight:var(--weight-semibold)}.kind-emphasis.is-material{color:var(--color-accent)}.kind-emphasis.is-exam{color:var(--color-warning-ink)}.kind-chip{display:inline-flex;flex:0 0 auto;align-items:center;padding:0 var(--space-2);border-radius:var(--radius-pill);font-size:var(--text-xs);line-height:1.5;white-space:nowrap}.kind-chip.is-material{background:var(--color-accent-soft);color:var(--color-accent-strong)}.kind-chip.is-exam{background:var(--color-warning-soft);color:var(--color-warning-ink)}.library-relation-picker__empty{margin-top:var(--space-1);color:var(--color-ink-muted);font-size:var(--text-xs)}.document-detail{gap:var(--space-5)}.document-panel{display:flex;flex-direction:column;gap:var(--space-11)}.document-panel__quiz,.document-panel__content{display:flex;flex-direction:column;gap:var(--space-8)}.document-tab-panel{display:flex;flex-direction:column;gap:var(--space-5)}.related-style-summary{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-5);border-radius:var(--radius-md);background:var(--color-surface);box-shadow:var(--ring-hairline)}.related-style-summary__icon{display:grid;width:var(--control-height-lg);height:var(--control-height-lg);flex:0 0 var(--control-height-lg);place-items:center;border-radius:var(--radius-sm);background:var(--color-warning-soft);color:var(--color-warning-ink)}.related-style-summary__icon svg{width:var(--icon-lg);height:var(--icon-lg)}.related-style-summary__copy{min-width:0;flex:1}.related-style-summary__copy>p{color:var(--color-accent-strong);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.08em;text-transform:uppercase}.related-style-summary__copy h2{margin-top:var(--space-1);font-size:var(--text-lg)}.related-style-summary__copy>span{display:block;margin-top:var(--space-1);color:var(--color-ink-muted);font-size:var(--text-sm)}.related-style-summary__documents{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-3)}.related-style-summary__documents a{max-width:18rem;overflow:hidden;padding:var(--space-1) var(--space-2);border-radius:var(--radius-pill);background:var(--color-warning-soft);color:var(--color-warning-ink);font-size:var(--text-xs);font-weight:var(--weight-medium);text-overflow:ellipsis;white-space:nowrap}.related-style-summary__actions{flex:0 0 auto}.classification-section{display:grid;grid-template-columns:minmax(16rem,.7fr) minmax(0,1.3fr);gap:var(--space-7);padding:var(--space-7) 0;border-bottom:var(--stroke) solid var(--color-border-strong)}.classification-section__result{display:flex;align-items:flex-start;gap:var(--space-4)}.classification-section__icon{display:grid;width:var(--space-10);height:var(--space-10);flex:0 0 var(--space-10);place-items:center;border-radius:var(--radius-pill);background:var(--color-accent-soft);color:var(--color-accent-strong)}.classification-section__icon svg{width:var(--icon-lg);height:var(--icon-lg)}.classification-section__result p{color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.08em;text-transform:uppercase}.classification-section__result h2{margin-top:var(--space-1);font-family:var(--font-display);font-size:var(--text-xl)}.classification-section__badges{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-3)}.classification-section__fields{display:flex;min-width:0;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:var(--space-4)}.classification-section__fields>span{display:flex;min-width:0;flex-direction:column;gap:var(--space-1)}.classification-section__fields small{color:var(--color-ink-muted);font-size:var(--text-xs)}.classification-section__fields strong{max-width:12rem;overflow:hidden;color:var(--color-ink);font-size:var(--text-sm);text-overflow:ellipsis;white-space:nowrap}.analysis-pending{text-align:center}.analysis-pending>p{margin-top:var(--space-3);color:var(--color-ink-muted);font-size:var(--text-sm)}.document-section{padding-top:var(--space-3)}.unit-table{border-top:var(--stroke) solid var(--color-border-strong)}.unit-row-compact{display:grid;grid-template-columns:var(--space-8) minmax(0,1fr) 8rem 14rem;align-items:start;gap:var(--space-4);padding:var(--space-4) 0;border-bottom:var(--stroke) solid var(--color-border)}.unit-row-compact__number,.unit-row-compact__pages,.unit-row-compact__plan{color:var(--color-ink-muted);font-size:var(--text-xs);font-variant-numeric:tabular-nums}.unit-row-compact__copy h3{font-size:var(--text-base)}.unit-row-compact__copy p{margin-top:var(--space-1);color:var(--color-ink-muted);font-size:var(--text-sm)}.unit-row-compact__plan{color:var(--color-accent-strong);font-weight:var(--weight-medium);text-align:right}.concept-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:var(--stroke) solid var(--color-border-strong)}.concept-list>div{display:grid;grid-template-columns:minmax(6rem,.55fr) minmax(0,1fr);gap:var(--space-4);padding:var(--space-4) 0;border-bottom:var(--stroke) solid var(--color-border)}.concept-list>div:nth-child(odd){padding-right:var(--space-5)}.concept-list>div:nth-child(2n){padding-left:var(--space-5);border-left:var(--stroke) solid var(--color-border)}.concept-list dt{font-weight:var(--weight-semibold)}.concept-list dd{color:var(--color-ink-muted);font-size:var(--text-sm)}.section-note{padding:var(--space-4) 0;border-top:var(--stroke) solid var(--color-border);border-bottom:var(--stroke) solid var(--color-border);color:var(--color-ink-muted);font-size:var(--text-sm)}.page-reading-list{border-top:var(--stroke) solid var(--color-border-strong)}.unit-stack{display:flex;flex-direction:column;gap:var(--space-10)}.unit-block{display:flex;flex-direction:column;gap:var(--space-5)}.unit-block__head{display:flex;gap:var(--space-4);align-items:baseline}.unit-block__number{flex:0 0 2rem;color:var(--color-accent-strong);font-size:var(--text-sm);font-weight:var(--weight-semibold);letter-spacing:.08em}.unit-block__copy h3{font-family:var(--font-display);font-size:var(--text-lg);font-weight:var(--weight-semibold)}.unit-block__range{margin-top:var(--space-1);color:var(--color-ink-muted);font-size:var(--text-sm)}.unit-block__points{padding:var(--space-5);border-radius:var(--radius-lg);background:var(--color-surface-muted)}.unit-block__points h4{margin-bottom:var(--space-3);color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.08em}.unit-visual{display:flex;flex-direction:column;gap:var(--space-3);margin:var(--space-6) 0 0}.unit-visual+.unit-visual{margin-top:var(--space-7)}.unit-visual figcaption{color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.08em}.unit-table-scroll{overflow-x:auto;border:var(--stroke) solid var(--color-border);border-radius:var(--radius-md)}.unit-visual__table{width:100%;border-collapse:collapse;font-size:var(--text-sm)}.unit-visual__table th,.unit-visual__table td{padding:var(--space-3) var(--space-4);border-bottom:var(--stroke) solid var(--color-border);text-align:left;vertical-align:top}.unit-visual__table thead th{background:var(--color-surface-muted);color:var(--color-ink-muted);font-weight:var(--weight-semibold)}.unit-visual__table tbody tr:last-child th,.unit-visual__table tbody tr:last-child td{border-bottom:0}.unit-visual__table tbody th{color:var(--color-ink);font-weight:var(--weight-semibold)}.unit-flow{display:flex;flex-wrap:wrap;gap:var(--space-2);margin:0;padding:0;list-style:none;counter-reset:unit-flow}.unit-flow__step{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);border:var(--stroke) solid var(--color-border);border-radius:var(--radius-pill);color:var(--color-ink-soft);counter-increment:unit-flow;font-size:var(--text-sm)}.unit-flow__step:before{color:var(--color-accent);content:counter(unit-flow);font-weight:var(--weight-semibold)}.unit-diagram{display:flex;flex-direction:column;gap:var(--space-4)}.unit-diagram__root{align-self:stretch;margin:0;padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);background:var(--color-surface-muted);color:var(--color-ink);font-size:var(--text-sm);font-weight:var(--weight-semibold)}.unit-diagram__branches{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(11rem,100%),1fr));gap:var(--space-3);margin:0;padding:0;list-style:none}.unit-diagram__branch{position:relative;padding:var(--space-4);border:var(--stroke) solid var(--color-border);border-radius:var(--radius-md)}.unit-diagram__branch:before{position:absolute;top:calc(var(--space-4) * -1);left:50%;width:var(--stroke);height:var(--space-4);background:var(--color-border);content:"";transform:translate(-50%)}.unit-diagram__label{margin:0;color:var(--color-ink);font-size:var(--text-sm);font-weight:var(--weight-semibold)}.unit-diagram__items{display:flex;flex-direction:column;gap:var(--space-1);margin:var(--space-2) 0 0;padding:0;list-style:none;color:var(--color-ink-soft);font-size:var(--text-sm)}.term-gloss{margin-left:var(--space-1);color:var(--color-ink-muted)}.page-skipped{padding:var(--space-4) 0;border-bottom:var(--stroke) solid var(--color-border);color:var(--color-ink-muted);font-size:var(--text-sm)}.page-reading-row{display:flow-root;padding:var(--space-7) 0;border-bottom:var(--stroke) solid var(--color-border)}.page-reading-row__copy{min-width:0;padding-top:0}.page-reading-row__number{color:var(--color-accent-strong);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.08em}.page-reading-row h3{margin-top:var(--space-2);font-family:var(--font-display);font-size:var(--text-lg)}.page-reading-row__head{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-3) var(--space-4)}.mnemonic{margin-top:var(--space-5)}.mnemonic__title{color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.08em}.mnemonic__styles{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-3)}.mnemonic__style{padding:var(--space-1) var(--space-3);border:var(--stroke) solid var(--color-border);border-radius:var(--radius-pill);color:var(--color-ink-soft);font-size:var(--text-sm);font-weight:var(--weight-regular)}.mnemonic__style.is-active{border-color:var(--color-accent);color:var(--color-accent);font-weight:var(--weight-semibold)}.mnemonic__card{margin-top:var(--space-3);padding:var(--space-4);border-radius:var(--radius-md);background:var(--color-surface-muted)}.mnemonic__device{font-family:var(--font-display);font-size:var(--text-lg);font-weight:var(--weight-semibold)}.mnemonic__explanation{margin-top:var(--space-2);color:var(--color-ink-soft);white-space:pre-wrap}.landing{--landing-width: 64rem;display:flex;min-height:100vh;flex-direction:column;align-items:center;gap:var(--space-11);padding:var(--space-6) var(--space-6) var(--space-11);background:var(--color-canvas)}.landing-top{display:grid;width:min(100%,var(--landing-width));align-items:center;gap:var(--space-8);padding-top:var(--space-9);grid-template-columns:minmax(0,1fr) minmax(0,1.15fr)}.landing-hero{display:flex;flex-direction:column;align-items:center;gap:var(--space-5);text-align:center}.landing-hero__brand{margin-bottom:var(--space-2)}.landing-hero__title{font-family:var(--font-display);font-size:var(--text-display);font-weight:var(--weight-semibold);letter-spacing:-.0375rem;line-height:var(--leading-tight)}.landing-hero__lede{color:var(--color-ink-soft);font-size:var(--text-md);line-height:var(--leading-body)}.landing-cta{display:flex;width:min(100%,22rem);flex-direction:column;gap:var(--space-3);margin-top:var(--space-2)}.landing-hero__note{color:var(--color-ink-muted);font-size:var(--text-sm)}.landing-demo{display:flex;min-width:0;flex-direction:column;gap:var(--space-3)}.landing-demo__frame{width:100%;overflow:hidden;border:var(--stroke) solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-floating)}.landing-demo__video{display:block;width:100%;height:auto}.landing-list{display:flex;width:min(100%,var(--landing-width));flex-direction:column;gap:var(--space-6)}.landing-list__title{font-family:var(--font-display);font-size:var(--text-xl);font-weight:var(--weight-semibold)}.landing-list__items{display:flex;flex-direction:column;margin:0;padding:0;list-style:none}.landing-item{display:flex;gap:var(--space-5);padding:var(--space-6) 0;border-top:var(--stroke) solid var(--color-border)}.landing-item__number{flex:0 0 2.5rem;color:var(--color-ink-muted);font-size:var(--text-sm);font-weight:var(--weight-semibold);letter-spacing:.08em}.landing-item__copy{display:flex;min-width:0;flex-direction:column;gap:var(--space-2);max-width:var(--reading-width)}.landing-item h3{display:flex;align-items:center;gap:var(--space-2);font-family:var(--font-display);font-size:var(--text-md);font-weight:var(--weight-semibold)}.landing-item h3 svg{width:var(--icon-md);height:var(--icon-md);color:var(--color-accent)}.landing-item p{color:var(--color-ink-soft);line-height:var(--leading-body)}.landing-close{display:flex;width:min(100%,var(--landing-width));flex-direction:column;align-items:center;gap:var(--space-3);padding-top:var(--space-9);border-top:var(--stroke) solid var(--color-border);text-align:center}.landing-close h2{font-family:var(--font-display);font-size:var(--text-xl);font-weight:var(--weight-semibold)}.landing-close p{color:var(--color-ink-soft)}.page-points{margin-top:var(--space-3)}.page-reading-row__copy>p:not(.page-reading-row__number){margin-top:var(--space-3);color:var(--color-ink-soft)}.keyword-list{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-4);font-size:var(--text-sm)}.compact-link-list{display:grid;overflow:hidden;border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--ring-hairline)}.compact-link-list a{display:flex;min-width:0;align-items:center;justify-content:space-between;gap:var(--space-4);min-height:var(--tap-target);padding:var(--space-4);background:var(--color-transparent)}.compact-link-list a+a{border-top:var(--stroke) solid var(--color-border)}.compact-link-list a:hover{background:var(--color-surface-muted);color:var(--color-accent-strong)}.compact-link-list a>span{display:flex;min-width:0;flex-direction:column}.compact-link-list strong,.compact-link-list small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.compact-link-list small{color:var(--color-ink-muted)}.compact-link-list svg{width:var(--icon-md)}.previous-attempt-line{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) 0;border-top:var(--stroke) solid var(--color-border);border-bottom:var(--stroke) solid var(--color-border);color:var(--color-ink-muted);font-size:var(--text-sm)}.quiz-runner{display:flex;flex-direction:column;gap:var(--space-6)}.quiz-result{display:flex;flex-direction:column;align-items:center;gap:var(--space-3);padding:var(--space-8);border-top:var(--stroke) solid var(--color-border-strong);border-bottom:var(--stroke) solid var(--color-border-strong);text-align:center}.quiz-result>p:first-child{color:var(--color-accent-strong);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.1em;text-transform:uppercase}.quiz-result__score{display:flex;align-items:baseline;font-family:var(--font-display)}.quiz-result__score strong{font-size:var(--text-display);font-weight:var(--weight-semibold);line-height:1}.quiz-result__score span{font-size:var(--text-lg)}.quiz-result>p:not(:first-child){color:var(--color-ink-muted)}.quiz-progress-line{display:flex;justify-content:flex-end}.quiz-progress-line>.ui-progress{min-width:min(12rem,100%)}@media(max-width:52rem){.quiz-progress-line>.ui-progress{flex:1}}.quiz-focus-workspace{display:flex;min-height:0;flex:1;flex-direction:column;gap:var(--space-2)}.quiz-focus-overview{display:grid;flex:0 0 auto;gap:var(--space-1)}.quiz-question-list{display:grid;gap:0}.quiz-question-jump-list{display:flex;overflow-x:auto;gap:var(--space-1);padding:var(--space-1);scrollbar-width:thin}.quiz-question-jump{width:var(--tap-target);min-width:var(--tap-target);min-height:var(--tap-target);padding:0;border-radius:var(--radius-pill);background:var(--color-surface-muted);color:var(--color-ink-muted)}.quiz-question-jump.is-answered{background:var(--color-accent-soft);color:var(--color-accent-strong)}.quiz-question-jump.is-revealed{background:var(--color-success-soft);color:var(--color-success)}.quiz-question-jump.is-current,.quiz-question-jump.is-current:hover{background:var(--color-accent);color:var(--color-surface)}.quiz-card-viewport{overflow:clip;margin-block:calc(var(--space-4) * -1);padding-block:var(--space-4)}.quiz-card-stage.is-leaving{pointer-events:none}.quiz-card-stage.is-leaving.is-forward{animation:quiz-card-leave-forward var(--motion-quick) ease-in 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var(--color-border)}.quiz-question:first-child{padding-top:0}.quiz-question:last-child{border-bottom:0}.quiz-question__header{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-2);color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-medium)}.quiz-question__number{flex:0 0 auto}.quiz-question__header .quiz-confusing-toggle,.quiz-question__explain{min-height:1.75rem;gap:var(--space-1);padding:0 var(--space-1);font-size:var(--text-xs);font-weight:var(--weight-regular)}.quiz-question__header .quiz-confusing-toggle+.quiz-question__explain{margin-left:calc(var(--space-1) * -1)}.quiz-question__header .quiz-question__meta{margin-left:auto}.quiz-question__header>div{display:flex;gap:var(--space-2)}.quiz-question h2{max-width:var(--reading-width);margin:var(--space-3) 0 var(--space-5);font-family:var(--font-display);font-size:var(--text-md);font-weight:var(--weight-medium);line-height:var(--leading-snug)}.exam-view-box{position:relative;margin:0 0 var(--space-5);padding:var(--space-6) var(--space-5) var(--space-5);border:var(--stroke) solid var(--color-border-strong);border-radius:var(--radius-xs);background:var(--color-surface)}.exam-view-box__label{position:absolute;top:0;left:50%;padding:0 var(--space-2);background:var(--color-surface);color:var(--color-ink);font-size:var(--text-sm);transform:translate(-50%,-50%);white-space:nowrap}.exam-view-box__items{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-3) var(--space-5)}.exam-view-box__item{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:baseline;gap:var(--space-2);color:var(--color-ink-soft)}.exam-view-box__item>span{color:var(--color-ink);font-weight:var(--weight-semibold)}.question-prompt__tail{max-width:var(--reading-width);margin:0 0 var(--space-5);color:var(--color-ink);font-size:var(--text-base);font-weight:var(--weight-regular);line-height:var(--leading-body)}.inline-grade-feedback{display:grid;grid-template-columns:auto 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-1;color:var(--color-ink-muted);font-size:var(--text-xs)}.quiz-options{display:grid;grid-template-columns:minmax(0,1fr);gap:0}.quiz-essay-answer{display:grid;gap:var(--space-2)}.quiz-essay-answer>span{justify-self:end;color:var(--color-ink-muted);font-size:var(--text-xs)}.quiz-option{position:relative;display:flex;min-height:var(--tap-target);align-items:flex-start;gap:var(--space-3);padding:var(--space-3);border:0;border-radius:var(--radius-md);background:var(--color-transparent);color:var(--color-ink-soft);cursor:pointer;text-align:left;transition:background-color .16s ease,color .16s ease}.quiz-option:hover:not(.is-disabled){background:var(--color-surface-muted)}.quiz-option:has(.quiz-option__input:focus-visible){outline:var(--focus-ring);outline-offset:var(--space-1);box-shadow:0 0 0 var(--space-1) var(--color-focus)}.quiz-option__input{position:absolute;width:var(--stroke);height:var(--stroke);opacity:0;pointer-events:none}.quiz-option__input:focus-visible{outline:0;box-shadow:none}.quiz-option.is-disabled{cursor:default}.quiz-option.is-selected,.quiz-option.is-selected:hover{background:var(--color-accent-soft);color:var(--color-accent-strong)}.quiz-option.is-correct,.quiz-option.is-correct:hover{background:var(--color-success-soft);color:var(--color-success)}.quiz-option.is-wrong,.quiz-option.is-wrong:hover{background:var(--color-danger-soft);color:var(--color-danger)}.quiz-option__marker{width:var(--icon-lg);flex:0 0 var(--icon-lg);color:var(--color-ink-muted);font-size:var(--text-base);font-weight:var(--weight-semibold);line-height:var(--leading-body);text-align:center}.quiz-option__text{flex:1;font-size:var(--text-base);line-height:var(--leading-body)}.quiz-option__status{width:var(--icon-md);height:var(--icon-md);flex:0 0 var(--icon-md)}.quiz-explanation,.essay-feedback,.explanation{display:flex;flex-direction:column;gap:var(--space-3);margin-top:var(--space-4);padding:var(--space-4);border-left:var(--stroke-strong) solid var(--color-accent);background:var(--color-surface-muted);color:var(--color-ink-soft);font-size:var(--text-sm)}.quiz-explanation p{display:flex;flex-direction:column;gap:var(--space-1)}.quiz-submit-bar{position:sticky;z-index:8;bottom:var(--space-4);display:flex;align-items:center;justify-content:space-between;gap:var(--space-5);padding:var(--space-4) var(--space-5);border:0;border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-floating)}.quiz-submit-bar--focus{display:grid;grid-template-columns:auto minmax(0,1fr) auto}.quiz-submit-bar--focus .quiz-submit-bar__summary{align-items:center;text-align:center}.quiz-submit-bar>.quiz-submit-bar__actions{display:flex;flex-direction:row;align-items:center;gap:var(--space-1)}.quiz-focus-review-navigation{display:flex;align-items:center;justify-content:center;gap:var(--space-5)}.quiz-focus-review-navigation>strong{min-width:var(--space-10);text-align:center}.quiz-submit-bar>div{display:flex;flex-direction:column}.quiz-submit-bar span{color:var(--color-ink-muted);font-size:var(--text-sm)}.share-link-box{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:var(--space-2)}.share-empty{display:flex;align-items:center;gap:var(--space-4);color:var(--color-ink-muted)}.share-empty svg{width:var(--space-8);height:var(--space-8);flex:0 0 var(--space-8);color:var(--color-accent)}.shared-page{width:min(100% - var(--space-8),var(--content-width));margin:0 auto;padding:var(--space-7) 0 var(--space-11)}.shared-page__topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-9);padding-bottom:var(--space-4);border-bottom:var(--stroke) solid var(--color-border-strong)}.shared-page__brand{color:var(--color-accent-strong)}.shared-page>.page-header{margin-bottom:var(--space-8)}.shared-page__report-receipt{margin-bottom:var(--space-5);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background:var(--color-success-soft);color:var(--color-success);font-size:var(--text-sm);font-weight:var(--weight-medium)}.shared-page__state-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-2);margin-top:var(--space-4)}.shared-report-form{display:grid;gap:var(--space-5)}.shared-report-form>label:not(.ui-checkbox){display:grid;gap:var(--space-2);color:var(--color-ink);font-size:var(--text-sm);font-weight:var(--weight-medium)}.shared-report-form label small,.shared-report-form>p,.shared-report-form>label>small{color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-medium)}.shared-report-form>label>small{justify-self:end}.shared-report-form a{color:var(--color-accent-strong);font-weight:var(--weight-medium)}.signup-hook{display:flex;align-items:center;flex-wrap:wrap;justify-content:space-between;gap:var(--space-5);margin-top:var(--space-8);padding:var(--space-6);border-radius:var(--radius-lg);background:var(--color-accent-soft)}.signup-hook__copy>strong{display:block;color:var(--color-ink);font-family:var(--font-display);font-size:var(--text-md);font-weight:var(--weight-semibold)}.signup-hook__copy>p{margin-top:var(--space-1);color:var(--color-ink-soft);font-size:var(--text-sm);line-height:var(--leading-body)}.shared-page__footer{margin-top:var(--space-10);padding-top:var(--space-5);border-top:var(--stroke) solid var(--color-border);color:var(--color-ink-muted);font-size:var(--text-xs);text-align:center}.history-list{display:flex;flex-direction:column}.mistake-list{display:grid;gap:var(--space-3)}.history-row{position:relative;display:grid;grid-template-columns:6.5rem minmax(0,1fr) auto auto;align-items:center;gap:var(--space-4);padding:var(--space-4) 0;border-bottom:var(--stroke) solid var(--color-border)}.history-row__icon{display:grid;width:3.25rem;height:3.25rem;place-items:center;border-radius:var(--radius-pill);background:var(--color-accent-soft);color:var(--color-accent-strong)}.history-row__thumbnail{width:6.5rem;aspect-ratio:16 / 9;overflow:hidden;border:var(--stroke) solid var(--color-border);border-radius:var(--radius-xs);background:var(--color-surface)}.history-row__thumbnail img{width:100%;height:100%;object-fit:cover;object-position:top center}.history-row__icon svg{width:var(--icon-md);height:var(--icon-md)}.history-row__copy{min-width:0}.history-row__labels{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-2);color:var(--color-ink-muted);font-size:var(--type-meta-size)}.history-row__copy>a{display:block;margin-top:var(--space-1);overflow:hidden;font-family:var(--font-display);font-size:var(--type-item-size);font-weight:var(--type-item-weight);text-overflow:ellipsis;white-space:nowrap}.history-row__copy>a:hover{color:var(--color-accent-strong)}.history-row__copy>p{margin-top:var(--space-1);overflow:hidden;color:var(--color-ink-muted);font-size:var(--type-meta-size);text-overflow:ellipsis;white-space:nowrap}.history-row__unattempted{color:var(--color-ink-muted);font-size:var(--type-meta-size);text-align:right}.history-row__score{display:flex;min-width:5rem;align-items:baseline;justify-content:flex-end;font-family:var(--font-display)}.history-row__score strong{font-size:var(--text-lg);line-height:1}.history-row__score>small{display:block;width:100%;color:var(--color-ink-muted);font-family:var(--font-body);font-size:var(--text-xs);text-align:right}.history-row__score{flex-wrap:wrap}.api-docs-meta{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) 0;border-top:var(--stroke) solid var(--color-border);border-bottom:var(--stroke) solid var(--color-border);color:var(--color-ink-muted);font-size:var(--text-sm)}.endpoint-list{border-top:var(--stroke) solid var(--color-border-strong)}.endpoint-row{border-bottom:var(--stroke) solid var(--color-border)}.endpoint-row summary{display:grid;grid-template-columns:4.5rem minmax(12rem,.8fr) minmax(0,1fr) auto;align-items:center;gap:var(--space-3);padding:var(--space-4) 0;list-style:none}.endpoint-row summary::-webkit-details-marker{display:none}.endpoint-row summary code,.endpoint-row__detail code{font-family:var(--font-mono);font-size:var(--text-xs)}.endpoint-row 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dd{color:var(--color-ink-muted)}.schema-line{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-2)}.component-library{display:flex;width:min(100% - var(--space-8),var(--content-width));margin:0 auto;flex-direction:column;gap:var(--space-10);padding:var(--space-10) 0 var(--space-11)}.library-section{padding-top:var(--space-6);border-top:var(--stroke) solid var(--color-border-strong)}.component-composition{display:flex;flex-direction:column;gap:var(--space-5)}.component-quiz-session-header{position:static}.component-brand-row{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-7);margin-bottom:var(--space-5)}.component-library 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var(--color-border);border-radius:var(--radius-md)}.token-color--canvas{background:var(--color-canvas)}.token-color--surface{background:var(--color-surface)}.token-color--ink{background:var(--color-ink)}.token-color--accent{background:var(--color-accent)}.token-color--success{background:var(--color-success)}.token-color--warning{background:var(--color-warning)}.token-color--danger{background:var(--color-danger)}.type-specimens{display:grid;gap:var(--space-4)}.type-display{font-family:var(--font-display);font-size:var(--text-display);line-height:1}.type-heading{font-family:var(--font-display);font-size:var(--text-xl)}.type-body{color:var(--color-ink-soft);font-size:var(--type-body-size);font-weight:var(--type-body-weight)}.type-label{color:var(--color-accent-strong);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.1em}.token-measure-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:var(--space-4)}.space-sample,.radius-sample{display:block;background:var(--color-accent-soft)}.space-sample--1{width:var(--space-1);height:var(--space-1)}.space-sample--2{width:var(--space-2);height:var(--space-2)}.space-sample--3{width:var(--space-3);height:var(--space-3)}.space-sample--4{width:var(--space-4);height:var(--space-4)}.radius-sample{width:var(--space-10);height:var(--space-10)}.radius-sample--sm{border-radius:var(--radius-sm)}.radius-sample--lg{border-radius:var(--radius-lg)}.component-row{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-3);margin-top:var(--space-4)}.component-status{margin-top:var(--space-3);color:var(--color-ink-muted);font-size:var(--text-sm)}.form-specimens{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-5)}.apple-hig-contract{display:grid;overflow:hidden;margin:0;border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--ring-hairline)}.apple-hig-contract>div{display:grid;grid-template-columns:minmax(7rem,.24fr) minmax(0,1fr);gap:var(--space-5);padding:var(--space-4) var(--space-5)}.apple-hig-contract>div+div{border-top:var(--stroke) solid var(--color-border)}.apple-hig-contract dt{color:var(--color-ink);font-weight:var(--weight-semibold)}.apple-hig-contract dd{color:var(--color-ink-soft)}.form-specimens>label,.form-specimens>.form-specimen-field{display:flex;flex-direction:column;gap:var(--space-2);font-size:var(--text-sm);font-weight:var(--weight-medium)}.form-specimens__wide{grid-column:1 / -1}.input-with-icon{position:relative}.input-with-icon>svg{position:absolute;top:50%;left:var(--space-3);z-index:1;width:var(--icon-sm);transform:translateY(-50%);color:var(--color-ink-muted)}.input-with-icon .ui-input{padding-left:var(--space-8)}.library-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-4)}.library-card-grid .ui-card{display:grid;gap:var(--space-2)}.library-card-grid svg{color:var(--color-accent)}.library-card-grid p{color:var(--color-ink-muted)}.skeleton-specimen{display:flex;gap:var(--space-4);margin:var(--space-5) 0}.skeleton-specimen>span{display:flex;flex:1;flex-direction:column;gap:var(--space-3);padding-top:var(--space-3)}.set-library-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(var(--set-card-min-width),1fr));gap:var(--space-4)}.set-library-card{display:flex;min-height:var(--set-card-min-height);flex-direction:column;transition:border-color .16s ease,box-shadow .16s ease,transform .12s ease}.set-library-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-floating);transform:translateY(calc(var(--stroke) * -2))}.set-library-card__meta,.set-library-card footer{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);color:var(--color-ink-muted);font-size:var(--text-xs)}.set-library-card 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svg{width:var(--icon-sm);height:var(--icon-sm)}.sets-home-link{align-self:flex-start}.mode-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3)}.mode-link{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-4);border:0;border-radius:var(--radius-md);background:var(--color-surface);font-weight:var(--weight-medium)}.mode-link:hover{color:var(--color-accent-strong)}.flashcard-zone{margin-top:var(--space-5);perspective:80rem}.flashcard{position:relative;height:24rem;cursor:pointer;transform-style:preserve-3d;transition:transform .25s ease}.flashcard.flipped{transform:rotateX(180deg)}.flashcard .face{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:var(--space-8);border:0;border-radius:var(--radius-lg);backface-visibility:hidden;background:var(--color-surface);text-align:center}.flashcard .face.back{transform:rotateX(180deg)}.flashcard 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var(--space-5);border:0;background:var(--color-bar);box-shadow:var(--shadow-top)}@media(min-width:61rem){.lecture-player-bar{left:var(--sidebar-width)}}@media(max-width:60.99rem){.lecture-player-bar{bottom:var(--bottom-nav-height)}}.page-stack.has-player-bar{padding-bottom:var(--space-9)}.lecture-player-bar__controls{position:relative;display:flex;width:100%;align-items:center;justify-content:center}.lecture-player-bar__buttons{display:flex;align-items:center;gap:var(--space-1)}.lecture-player-bar__seek{display:flex;width:100%;align-items:center;gap:var(--space-3)}.lecture-player-bar__buttons button{display:flex;width:var(--space-7);height:var(--space-7);align-items:center;justify-content:center;border:0;border-radius:var(--radius-pill);background:var(--color-transparent);color:var(--color-ink-muted);cursor:pointer;transition:background var(--motion-quick) ease,color var(--motion-quick) ease}.lecture-player-bar__buttons button:hover{background:var(--color-surface-muted);color:var(--color-ink)}.lecture-player-bar__buttons svg{width:var(--space-4);height:var(--space-4)}.lecture-player-bar__buttons .lecture-player-bar__play{background:var(--color-accent);color:var(--color-surface)}.lecture-player-bar__buttons .lecture-player-bar__play:hover{background:var(--color-accent-strong);color:var(--color-surface)}.lecture-player-bar__rate{position:absolute;right:0;min-width:var(--space-8);padding:var(--space-1) var(--space-2);border:0;border-radius:var(--radius-pill);background:var(--color-surface-muted);color:var(--color-ink);font-size:var(--text-xs);font-weight:var(--weight-semibold);font-variant-numeric:tabular-nums;cursor:pointer}.lecture-player-bar__rate:hover{color:var(--color-accent-strong)}.lecture-player-bar__time{color:var(--color-ink-muted);font-size:var(--text-xs);font-variant-numeric:tabular-nums}.lecture-player-bar__track{position:relative;display:flex;flex:1;align-items:center}.lecture-player-bar__track input[type=range]{width:100%;accent-color:var(--color-accent)}.lecture-player-bar__tick{position:absolute;top:50%;width:var(--space-1);height:var(--space-3);border-radius:var(--radius-pill);background:var(--color-ink-muted);pointer-events:none;transform:translate(-50%,-50%)}.lecture-session-divider{display:flex;align-items:center;gap:var(--space-2);margin:var(--space-5) 0 var(--space-3);color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-semibold)}.lecture-session-divider svg{width:var(--space-4);height:var(--space-4)}.lecture-session-divider:after{flex:1;border-top:var(--stroke) solid var(--color-border);content:""}.translations-dropzone{display:flex;flex-direction:column;align-items:center;gap:var(--space-2);padding:var(--space-7) var(--space-5);border:var(--stroke-strong) dashed var(--color-border-strong);border-radius:var(--radius-md);background:var(--color-transparent);color:var(--color-ink-muted);cursor:pointer;transition:border-color var(--motion-quick) ease,color var(--motion-quick) ease}.translations-dropzone:hover{border-color:var(--color-accent);color:var(--color-ink)}.translations-dropzone svg{width:var(--space-6);height:var(--space-6)}.translations-dropzone strong{color:var(--color-ink);font-size:var(--text-md);font-weight:var(--weight-semibold)}.doc-overview{margin-bottom:var(--space-6);padding:var(--space-5);border-radius:var(--radius-md);background:var(--color-surface-muted)}.doc-overview h3{margin:0 0 var(--space-3);font-size:var(--text-md);font-weight:var(--weight-semibold)}.doc-overview h4{margin:var(--space-4) 0 var(--space-2);color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-semibold)}.doc-overview__goal{margin:0;color:var(--color-ink);font-size:var(--text-sm);line-height:1.7}.doc-overview__storyline{margin:0;color:var(--color-ink-soft);font-size:var(--text-sm);line-height:1.7}.doc-overview__keys{display:flex;flex-direction:column;gap:var(--space-2);margin:0;padding-left:var(--space-5);font-size:var(--text-sm);line-height:1.6}.doc-overview__keys strong{margin-right:var(--space-2);color:var(--color-ink)}.doc-overview__keys span{color:var(--color-ink-soft)}.unit-prereq__intro{margin:0 0 var(--space-3);color:var(--color-ink-soft);font-size:var(--text-sm);line-height:1.6}.unit-prereq h4{margin:0 0 var(--space-3);color:var(--color-ink-muted);font-size:var(--text-xs);font-weight:var(--weight-semibold)}.unit-prereq dl{display:flex;flex-direction:column;gap:var(--space-2);margin:0}.unit-prereq__item{display:flex;flex-wrap:wrap;gap:var(--space-2);font-size:var(--text-sm)}.unit-prereq dt{color:var(--color-ink);font-weight:var(--weight-semibold)}.unit-prereq dd{margin:0;color:var(--color-ink-soft);overflow-wrap:anywhere}.inline-term-chip.has-hue{color:hsl(var(--term-hue) 62% 36%)}@media(prefers-color-scheme:dark){.inline-term-chip.has-hue{color:hsl(var(--term-hue) 55% 72%)}}