:root,:root[data-theme=light]{color-scheme:light;--ground: #EEF4E0;--surface: #FFFFFF;--surface-2: #F1F5E7;--surface-3: #E3EBD5;--line: #DCE5CD;--line-strong: #BFCCAC;--ink: #1A2620;--ink-2: #36453C;--muted: #4F5F56;--faint: #5F6F66;--accent: #1F7A70;--accent-strong: #176258;--accent-solid: #1F7A70;--accent-solid-ink: #FFFFFF;--accent-wash: rgba(31, 122, 112, .09);--accent-wash-2: rgba(31, 122, 112, .17);--leaf: #8DBA4E;--argon: #7542A8;--argon-solid: #7C48B2;--argon-solid-ink: #FFFFFF;--argon-wash: rgba(124, 72, 178, .1);--sun: #985800;--sun-solid: #E9A23B;--sun-wash: rgba(233, 162, 59, .17);--danger: #B9413A;--danger-wash: rgba(185, 65, 58, .1);--ok: #267849;--ok-wash: rgba(42, 127, 78, .12);--name-teacher: #1F7A70;--name-student: #36453C;--math-bg: rgba(31, 122, 112, .05);--code-bg: #F1F5E7;--shadow-1: 0 1px 2px rgba(26, 46, 30, .06), 0 4px 14px rgba(26, 46, 30, .05);--shadow-2: 0 2px 6px rgba(26, 46, 30, .08), 0 16px 40px rgba(26, 46, 30, .12);--backdrop: rgba(16, 28, 21, .4);--scrim-strong: rgba(8, 14, 11, .92);--scroll-thumb: #C6D2B3}:root[data-theme=dark]{color-scheme:dark;--ground: #0E1D17;--surface: #14261F;--surface-2: #1B3028;--surface-3: #243A31;--line: #25392F;--line-strong: #375046;--ink: #E5EFE8;--ink-2: #C2D2C8;--muted: #98ACA0;--faint: #84998C;--accent: #5FC4A8;--accent-strong: #86D9BF;--accent-solid: #3FA08C;--accent-solid-ink: #06130E;--accent-wash: rgba(95, 196, 168, .1);--accent-wash-2: rgba(95, 196, 168, .18);--leaf: #B4D86A;--argon: #CFA9F2;--argon-solid: #B286E3;--argon-solid-ink: #170C22;--argon-wash: rgba(207, 169, 242, .13);--sun: #F0B23C;--sun-solid: #F0B23C;--sun-wash: rgba(240, 178, 60, .14);--danger: #F0857A;--danger-wash: rgba(240, 133, 122, .12);--ok: #72CF95;--ok-wash: rgba(114, 207, 149, .12);--name-teacher: #5FC4A8;--name-student: #C2D2C8;--math-bg: rgba(95, 196, 168, .06);--code-bg: #1B3028;--shadow-1: 0 1px 2px rgba(0, 0, 0, .35), 0 4px 14px rgba(0, 0, 0, .25);--shadow-2: 0 2px 6px rgba(0, 0, 0, .4), 0 16px 40px rgba(0, 0, 0, .45);--backdrop: rgba(0, 0, 0, .58);--scrim-strong: rgba(0, 0, 0, .94);--scroll-thumb: #375046}:root [data-mode=argon]{--ground: #F1EAF8;--surface: #FFFDFF;--surface-2: #F3EDF9;--surface-3: #EDE5F6;--line: #E2D6EE;--line-strong: #C6B4DC;--ink: #221A2C;--ink-2: #3D3249;--muted: #594D67;--faint: #6B5F79;--accent: #7542A8;--accent-strong: #5F3290;--accent-solid: #7C48B2;--accent-solid-ink: #FFFFFF;--accent-wash: rgba(124, 72, 178, .09);--accent-wash-2: rgba(124, 72, 178, .17);--name-teacher: #1D7068;--math-bg: rgba(124, 72, 178, .06);--code-bg: #F3EDF9;--scroll-thumb: #CDBDE0}:root[data-theme=dark] [data-mode=argon]{--ground: #18122A;--surface: #201935;--surface-2: #292142;--surface-3: #342A50;--line: #2F2648;--line-strong: #4A3D69;--ink: #EEE8F6;--ink-2: #D4CAE5;--muted: #ABA0C2;--faint: #978CB0;--accent: #CFA9F2;--accent-strong: #E0C6F8;--accent-solid: #B286E3;--accent-solid-ink: #170C22;--accent-wash: rgba(207, 169, 242, .1);--accent-wash-2: rgba(207, 169, 242, .18);--name-teacher: #5FC4A8;--math-bg: rgba(207, 169, 242, .06);--code-bg: #292142;--scroll-thumb: #4A3D69}:root{--font: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;--mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, monospace;--r-xl: 24px;--r-lg: 18px;--r-md: 14px;--r-sm: 10px;--tap: 44px;--gutter: 16px;--sidebar: 300px;--topbar-h: 56px;--safe-t: env(safe-area-inset-top, 0px);--safe-b: env(safe-area-inset-bottom, 0px);--safe-l: env(safe-area-inset-left, 0px);--safe-r: env(safe-area-inset-right, 0px)}*,*:before,*:after{box-sizing:border-box}*{margin:0}html{height:100%;-webkit-text-size-adjust:100%;text-size-adjust:100%}body{min-height:100%;background:var(--ground);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;overflow-wrap:anywhere;font-feature-settings:"palt" 1;letter-spacing:.02em}.katex,code,pre,.mono{letter-spacing:0;font-feature-settings:normal}#root{min-height:100%}img,svg,video,canvas{display:block;max-width:100%}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}::selection{background:var(--accent-wash-2)}*{scrollbar-width:thin;scrollbar-color:var(--scroll-thumb) transparent}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:var(--tap);padding:0 18px;border-radius:var(--r-md);border:1px solid var(--line-strong);background:var(--surface);color:var(--ink);font-weight:500;font-size:15.5px;line-height:1.3;transition:background .15s,border-color .15s,transform .08s,opacity .15s;white-space:nowrap;user-select:none}.btn:hover{background:var(--surface-2)}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.5;cursor:default;transform:none}.btn.primary{background:var(--accent-solid);border-color:var(--accent-solid);color:var(--accent-solid-ink);font-weight:700}.btn.primary:hover{filter:brightness(1.05);background:var(--accent-solid)}.btn.ghost{background:transparent;border-color:transparent;color:var(--ink-2)}.btn.ghost:hover{background:var(--surface-2)}.btn.danger{color:var(--danger);border-color:var(--line-strong)}.btn.danger:hover{background:var(--danger-wash)}.btn.block{width:100%}.btn.small{min-height:var(--tap);padding:0 12px;font-size:14px;border-radius:var(--r-sm)}.btn.lg{min-height:52px;font-size:17px;border-radius:var(--r-lg);padding:0 22px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;flex:none;width:var(--tap);height:var(--tap);border-radius:50%;border:0;background:transparent;color:var(--ink-2);transition:background .15s,color .15s,transform .08s}.icon-btn:hover{background:var(--surface-2);color:var(--ink)}.icon-btn:active{transform:scale(.94)}.icon-btn:disabled{opacity:.45;cursor:default}.icon-btn[aria-pressed=true]{background:var(--accent-wash-2);color:var(--accent)}.field{display:flex;flex-direction:column;gap:6px}.field>label,.label{font-size:14px;font-weight:700;color:var(--ink-2)}.pw-form{display:flex;flex-direction:column;gap:14px}.pw-form .btn{margin-top:4px}.pw-first h1{font-size:22px;line-height:1.4;word-break:keep-all;overflow-wrap:anywhere}.pw-wrap{position:relative}.pw-wrap .input{padding-right:72px}.pw-eye{position:absolute;right:2px;top:50%;transform:translateY(-50%);min-height:var(--tap);padding:0 12px;border:0;background:none;color:var(--accent);font-size:14px;font-weight:500;border-radius:var(--r-sm)}.hint{font-size:13px;color:var(--muted);line-height:1.6}.input,.textarea,.select{width:100%;min-height:var(--tap);border:1px solid var(--line-strong);border-radius:var(--r-md);background:var(--surface);padding:10px 14px;font-size:16px;line-height:1.5;transition:border-color .15s,box-shadow .15s}.textarea{resize:vertical;min-height:96px}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-wash-2)}.input::placeholder,.textarea::placeholder{color:var(--faint)}.counter{font-size:12.5px;color:var(--faint);text-align:right}.counter.over{color:var(--danger)}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:18px}.panel+.panel{margin-top:14px}.panel-title{font-size:17px;font-weight:700;margin-bottom:4px}.muted{color:var(--muted)}.faint{color:var(--faint)}.error-text{color:var(--danger);font-size:14px}.seg{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:4px;padding:4px;background:var(--surface-2);border-radius:var(--r-md)}.seg button{min-height:var(--tap);border:0;border-radius:var(--r-sm);background:transparent;color:var(--muted);font-weight:500;font-size:15px;padding:0 8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.seg button[aria-pressed=true]{background:var(--surface);color:var(--ink);box-shadow:var(--shadow-1);font-weight:700}.pill{display:inline-flex;align-items:center;gap:4px;padding:1px 10px;border-radius:999px;font-size:12.5px;font-weight:500;line-height:1.7;background:var(--surface-2);color:var(--muted);white-space:nowrap}.pill.accent{background:var(--accent-wash);color:var(--accent)}.pill.argon{background:var(--argon-wash);color:var(--argon)}.pill.sun{background:var(--sun-wash);color:var(--sun)}.pill.danger{background:var(--danger-wash);color:var(--danger)}.pill.ok{background:var(--ok-wash);color:var(--ok)}.spinner{width:18px;height:18px;border-radius:50%;border:2.5px solid currentColor;border-right-color:transparent;animation:spin .8s linear infinite;flex:none;opacity:.8}@keyframes spin{to{transform:rotate(360deg)}}.dots{display:inline-flex;gap:4px;align-items:center}.dots i{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.35;animation:dot 1.2s infinite ease-in-out}.dots i:nth-child(2){animation-delay:.15s}.dots i:nth-child(3){animation-delay:.3s}@keyframes dot{0%,80%,to{opacity:.25;transform:translateY(0)}40%{opacity:.9;transform:translateY(-3px)}}.scrim{position:fixed;inset:0;background:var(--backdrop);z-index:60;animation:fade .18s ease}.sheet{position:fixed;left:0;right:0;bottom:0;z-index:61;background:var(--surface);border-radius:var(--r-xl) var(--r-xl) 0 0;max-height:calc(var(--app-h, 100dvh) - 40px - var(--safe-t));overflow-y:auto;overscroll-behavior:contain;padding:10px var(--gutter) calc(18px + var(--safe-b));box-shadow:var(--shadow-2);animation:up .22s cubic-bezier(.2,.8,.2,1)}.sheet:before{content:"";display:block;width:40px;height:4px;border-radius:4px;background:var(--line-strong);margin:0 auto 12px}.sheet h2{font-size:18px;font-weight:700;margin:2px 0 12px}.sheet-actions{display:flex;flex-direction:column;gap:8px}.sheet-row{display:flex;align-items:center;gap:14px;width:100%;min-height:52px;padding:0 14px;border:0;border-radius:var(--r-md);background:var(--surface-2);text-align:left;font-size:16px;font-weight:500}.sheet-row:hover{background:var(--surface-3)}.sheet-row svg{flex:none;color:var(--accent)}.sheet-row.danger{color:var(--danger)}.sheet-row.danger svg{color:var(--danger)}@media (min-width: 720px){.sheet{inset:50% auto auto 50%;transform:translate(-50%,-50%);width:min(480px,calc(100vw - 32px));border-radius:var(--r-xl);padding-bottom:20px;animation:pop .18s ease}.sheet:before{display:none}}@keyframes fade{0%{opacity:0}}@keyframes up{0%{transform:translateY(24px);opacity:0}}@keyframes pop{0%{opacity:0;transform:translate(-50%,-48%) scale(.98)}}.toasts{position:fixed;left:0;right:0;top:calc(var(--app-top, 0px) + var(--topbar-h) + var(--safe-t) + 8px);z-index:90;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none;padding:0 var(--gutter)}.toast{pointer-events:auto;max-width:440px;background:var(--ink);color:var(--surface);padding:10px 16px;border-radius:var(--r-md);font-size:14.5px;box-shadow:var(--shadow-2);animation:fade .2s ease}.toast.error{background:var(--danger);color:#fff}.center-screen{min-height:var(--app-h, 100dvh);display:flex;align-items:center;justify-content:center;padding:calc(24px + var(--safe-t)) var(--gutter) calc(24px + var(--safe-b))}.loading-screen{min-height:var(--app-h, 100dvh);display:flex;align-items:center;justify-content:center;color:var(--muted);gap:10px}.topbar{flex:none;display:flex;align-items:center;gap:6px;min-height:calc(var(--topbar-h) + var(--safe-t));padding:var(--safe-t) 8px 0 calc(8px + var(--safe-l));background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line);position:relative;z-index:5}.topbar-title{flex:1;min-width:0;font-weight:700;font-size:17px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.page{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.page-inner{max-width:720px;margin:0 auto;padding:16px var(--gutter) calc(32px + var(--safe-b))}.section-title{font-size:14px;font-weight:700;color:var(--muted);letter-spacing:.04em;margin:22px 4px 8px}.section-title:first-child{margin-top:4px}.avatar{flex:none;border-radius:50%;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;background:var(--accent-wash-2);color:var(--accent);font-weight:700;user-select:none}.avatar img{width:100%;height:100%;object-fit:cover}.avatar.student{background:var(--sun-wash);color:var(--sun)}.avatar.system{background:var(--surface-2);color:var(--muted)}.avatar.argon{background:var(--argon-wash);color:var(--argon)}:root[data-tier=elemLow] :where(.btn,.sheet-row,.drawer-link,.suggest button,.section-title,.hint,.field>label,.chat-empty p,.tool-note,.rec-note,.drawer-empty,.usage-row,.fc-weak-text,.fc-empty p,.fc-tap,.toast,.cam-count,.cam-msg p,.cam-full,.voice-ready p,.vc-ctrl-label,.vc-limit,.vc-error,.error-text,.st-pers-q,.topbar-title){word-break:keep-all}.hint,.chat-empty p{text-wrap:pretty}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}