@charset "UTF-8";@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";@import"https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,400,0,0";:root{--color-bg: #f8f9ff;--color-bg-elevated: #ffffff;--color-surface: #f8f9ff;--color-surface-container-low: #eff4ff;--color-surface-container: #e5eeff;--color-surface-container-high: #dce9ff;--color-surface-container-highest: #d3e4fe;--color-on-background: #0b1c30;--color-symbol: #006c49;--color-symbol-strong: #00422b;--color-symbol-soft: #10b981;--color-symbol-muted: #2b6954;--symbol-gradient: linear-gradient(135deg, #006c49, #10b981);--color-border-subtle: #bbcabf;--color-outline: #6c7a71;--color-text-main: #0b1c30;--color-text-muted: #3c4a42;--color-accent-fill-ghost: rgba(0, 108, 73, .08);--color-secondary-container: #adedd3;--color-on-secondary-container: #306d58;--color-tertiary-wash: #f0fdf4;--color-error: #ba1a1a;--color-error-container: #ffdad6;--shadow-soft: 0 4px 12px rgba(0, 0, 0, .05);--shadow-card: 0 1px 8px rgba(0, 0, 0, .04);--shadow-nav: 0 -1px 8px rgba(0, 0, 0, .04);--shadow-fab: 0 10px 24px rgba(0, 108, 73, .28);--symbol-shadow: 0 12px 24px rgba(0, 108, 73, .18);--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 48px;--margin-mobile: 16px;--transition-fast: .15s ease-out;--transition-med: .22s ease;--bottom-nav-height: 4rem;--bottom-nav-clearance: calc( var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px) + 1rem );--topbar-height: 4rem;--sidebar-width: 248px}[data-theme=dark]{--color-bg: #10161a;--color-bg-elevated: #1a2226;--color-surface: #10161a;--color-surface-container-low: #1d262b;--color-surface-container: #243036;--color-surface-container-high: #2c3a41;--color-surface-container-highest: #35454d;--color-on-background: #e3e9e6;--color-symbol: #34d399;--color-symbol-strong: #6ee7b7;--color-symbol-soft: #10b981;--color-symbol-muted: #8fc9af;--symbol-gradient: linear-gradient(135deg, #0f9d6c, #34d399);--color-border-subtle: #34423c;--color-outline: #82918a;--color-text-main: #e3e9e6;--color-text-muted: #a6b4ac;--color-accent-fill-ghost: rgba(52, 211, 153, .14);--color-secondary-container: #1e4636;--color-on-secondary-container: #9ff0cd;--color-tertiary-wash: #17211c;--color-error: #ff8a80;--color-error-container: #4a201c;--shadow-soft: 0 4px 12px rgba(0, 0, 0, .4);--shadow-card: 0 1px 8px rgba(0, 0, 0, .35);--shadow-nav: 0 -1px 8px rgba(0, 0, 0, .35);--shadow-fab: 0 10px 24px rgba(0, 0, 0, .5);--symbol-shadow: 0 12px 24px rgba(0, 0, 0, .45);color-scheme:dark}[data-theme=dark] .topbar{background:#10161ad9}[data-theme=dark] .sidebar{background:var(--color-bg-elevated);border-right-color:var(--color-border-subtle)}[data-theme=dark] .qna-card,[data-theme=dark] .note-comments__item,[data-theme=dark] .qna-answers__item,[data-theme=dark] .note-comments__input,[data-theme=dark] 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.button-ghost:hover:not(:disabled){color:var(--color-text-main);background:#0f172a1a;box-shadow:none}.note-editor__actions:has(button:disabled){display:none}.note-page-actions{position:fixed;top:82px;right:clamp(1rem,3vw,2rem);z-index:60;display:inline-flex;align-items:center;gap:.5rem;width:auto;margin:0;padding:.35rem;border:1px solid rgba(200,219,230,.72);border-radius:999px;background:#ffffffd1;box-shadow:0 14px 34px #0f172a1f;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.note-page-actions .button-ghost{color:#fff;background:var(--symbol-gradient);box-shadow:0 10px 22px #0059d638}.note-page-actions .button-danger{color:#b91c1c;background:#b91c1c14}@media(max-width:720px){.note-page-actions{top:auto;right:1rem;bottom:1rem}}.subject-tone{background:#6c7a7124;color:#55645b}.subject-tone--rose{background:#e11d4824;color:#be123c}.subject-tone--coral{background:#ea580c29;color:#c2410c}.subject-tone--amber{background:#d977062e;color:#b45309}.subject-tone--sage{background:#5e8b6029;color:#3f6b42}.subject-tone--teal{background:#0d948829;color:#0f766e}.subject-tone--sky{background:#0284c729;color:#0369a1}.subject-tone--indigo{background:#4f46e529;color:#4338ca}.subject-tone--violet{background:#7c3aed29;color:#6d28d9}.subject-tone--forest{background:#006c4924;color:#006c49}.subject-tone--mint{background:#10b98129;color:#059669}.subject-tone--slate{background:#47556929;color:#334155}.subject-tone--mist{background:#6c7a7124;color:#55645b}.app-root{display:flex;flex-direction:column;height:100vh;height:100dvh;overflow:hidden;background:var(--color-surface)}.app-root--welcome 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img{width:100%;height:100%;object-fit:contain}.topbar__logo-text-main{color:var(--color-symbol);font-size:1.25rem;font-weight:600;letter-spacing:-.02em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:min(11rem,42vw)}.topbar__logo-text-sub{display:none}.topbar__logo-actions{display:flex;align-items:center;gap:.15rem;margin-left:.35rem}.topbar__icon-btn{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;color:var(--color-symbol-muted);transition:background var(--transition-fast),color var(--transition-fast)}.topbar__icon-btn .material-symbols-outlined{font-size:1.25rem}.topbar__icon-btn:hover{background:var(--color-accent-fill-ghost);color:var(--color-symbol)}.topbar__actions{display:flex;align-items:center;gap:.75rem;margin-left:auto}.topbar__school{display:inline-flex;align-items:center;gap:.35rem;max-width:9rem;padding:.35rem .65rem;border:1px solid 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img{width:100%;height:100%;object-fit:cover}.topbar__menu-button{display:none;width:2.5rem;height:2.5rem;border:0;border-radius:.75rem;background:transparent;cursor:pointer}.topbar__menu-button span,.topbar__menu-button span:before,.topbar__menu-button span:after{display:block;width:1.1rem;height:2px;margin:0 auto;border-radius:999px;background:var(--color-text-main)}.topbar__menu-button span{position:relative}.topbar__menu-button span:before,.topbar__menu-button span:after{content:"";position:absolute;left:0}.topbar__menu-button span:before{top:-6px}.topbar__menu-button span:after{top:6px}.app-shell{display:grid;grid-template-columns:minmax(0,1fr);flex:1;min-height:0}.sidebar,.sidebar-overlay,.sidebar-sheet-overlay{display:none}.main-content{position:relative;z-index:1;width:100%;max-width:640px;min-width:0;height:100%;margin:0 auto;--content-pad-y: var(--space-md);--content-pad-x: var(--margin-mobile);padding:var(--content-pad-y) 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.sidebar__explorer-head{position:relative;padding-top:.95rem}.sidebar--sheet .sidebar__explorer-head:before{content:"";position:absolute;top:.4rem;left:50%;width:2.4rem;height:.28rem;border-radius:999px;background:var(--color-outline);opacity:.4;transform:translate(-50%)}.sidebar--sheet .sidebar__explorer-list{flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;padding-bottom:.5rem}}.sidebar__explorer{display:flex;flex-direction:column;min-height:0;flex:1}.sidebar__explorer-head{display:flex;align-items:center;gap:.35rem;padding:.25rem .25rem .6rem;border-bottom:1px solid var(--color-border-subtle)}.sidebar__explorer-back,.sidebar__explorer-add{display:grid;place-items:center;width:30px;height:30px;border:none;border-radius:8px;background:transparent;color:var(--color-text-muted);cursor:pointer}.sidebar__explorer-back .material-symbols-outlined,.sidebar__explorer-add 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rgba(187,202,191,.7);border-radius:.7rem;background:#fff;font:inherit;font-weight:500;color:var(--color-text-main)}.folder-split__thumbs{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(5.5rem,1fr));gap:.55rem}.folder-split__thumb{position:relative;aspect-ratio:3/4;border-radius:.65rem;overflow:hidden;background:var(--color-surface-container, #f4f7f4);box-shadow:var(--shadow-card)}.folder-split__thumb img{display:block;width:100%;height:100%;object-fit:cover}.folder-split__thumb--busy{opacity:.55}.folder-split__thumb--fail{outline:2px solid var(--color-error)}.folder-split__num{position:absolute;top:.3rem;left:.3rem;z-index:1;min-width:1.25rem;height:1.25rem;padding:0 .25rem;border-radius:999px;background:#101810b8;color:#fff;font-size:.7rem;font-weight:800;display:grid;place-items:center}.folder-split__remove{position:absolute;top:.25rem;right:.25rem;z-index:1;display:grid;place-items:center;width:1.5rem;height:1.5rem;padding:0;border:0;border-radius:999px;background:#ffffffdb;color:var(--color-text-muted);cursor:pointer}.folder-split__remove .material-symbols-outlined{font-size:1rem}.folder-split__remove:hover{background:#ba1a1a1f;color:var(--color-error)}@media(max-width:900px){.main-content{--content-pad-x: var(--margin-mobile);padding-inline:var(--content-pad-x);padding-bottom:var(--bottom-nav-clearance)}}@media(max-width:720px){.note-form__fields{grid-template-columns:minmax(0,1fr)}.composer-panel{right:10px;left:10px;width:auto;bottom:10px;max-height:calc(100vh - 20px);border-radius:22px}}@media(max-width:520px){.page-title{font-size:1.35rem}}.history-page{display:grid;gap:var(--space-lg)}.history-hero{display:grid;gap:.25rem}.history-actions{display:grid;gap:.75rem}.history-action{display:flex;align-items:center;gap:.85rem;padding:1rem;border-radius:var(--radius-lg);background:var(--color-bg-elevated);box-shadow:var(--shadow-soft)}.history-action__icon{display:grid;width:2.75rem;height:2.75rem;place-items:center;border-radius:var(--radius-md);color:var(--color-on-secondary-container);background:var(--color-secondary-container)}.history-action strong{display:block;font-size:.95rem;font-weight:600}.history-action p{margin:.15rem 0 0;color:var(--color-text-muted);font-size:.75rem}.history-action>div{flex:1;min-width:0}.history-action>.material-symbols-outlined{color:var(--color-outline)}.history-empty{display:grid;justify-items:center;gap:.75rem;padding:2rem 1.25rem;border-radius:var(--radius-lg);background:var(--color-bg-elevated);box-shadow:var(--shadow-soft);text-align:center}.history-empty__art{display:grid;width:5rem;height:5rem;place-items:center;border-radius:999px;color:var(--color-symbol);background:#adedd359}.history-empty__art .material-symbols-outlined{font-size:2rem}.history-empty h3{margin:0;font-size:1.15rem;font-weight:600}.history-empty p{margin:0;color:var(--color-text-muted)}.history-view-progress{display:block;flex:1;max-width:6.5rem;height:.35rem;border-radius:999px;background:#bbcabf73;overflow:hidden}.history-view-progress__fill{display:block;height:100%;border-radius:inherit;background:var(--symbol-gradient)}