:root{--bg:#f4f2ff;--surface:#fff;--text:#1f2340;--muted:#6b6f8a;--border:#e3e0f5;--accent:#5b5bd6;--accent-text:#fff;--accent-soft:#ecebff;--dot:#ff8a3d;--error-bg:#fff1f0;--error-border:#ffd2cc;--error-text:#b42318;color:var(--text);-webkit-text-size-adjust:100%;font-family:ui-rounded,SF Pro Rounded,Nunito,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:18px;line-height:1.5}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg)}button,select,textarea{font:inherit;color:inherit}button{cursor:pointer}.app{background:var(--bg);flex-direction:column;max-width:820px;height:100dvh;margin:0 auto;display:flex}.center{text-align:center;margin:auto;padding:16px}.muted{color:var(--muted)}.top{padding:max(12px, env(safe-area-inset-top)) 16px 4px;justify-content:space-between;align-items:center;gap:12px;display:flex}.title{white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:22px;font-weight:800;overflow:hidden}.day-select{border:2px solid var(--border);background:var(--surface);border-radius:14px;flex:none;max-width:55%;min-height:44px;padding:8px 12px;font-size:16px;font-weight:600}.subjects{scrollbar-width:none;gap:8px;padding:8px 16px 10px;display:flex;overflow-x:auto}.subjects::-webkit-scrollbar{display:none}.tab{border:2px solid var(--border);background:var(--surface);white-space:nowrap;border-radius:999px;flex:none;align-items:center;gap:6px;min-height:44px;padding:8px 16px;font-size:16px;font-weight:700;display:inline-flex;position:relative}.tab.active{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}.dot{background:var(--dot);border-radius:50%;width:9px;height:9px;position:absolute;top:4px;right:6px}.thread{overscroll-behavior:contain;flex-direction:column;flex:1;gap:12px;padding:12px 16px 20px;display:flex;overflow-y:auto}.bubble{white-space:pre-wrap;overflow-wrap:anywhere;border-radius:22px;max-width:85%;padding:12px 16px}.bubble.user{background:var(--accent);color:var(--accent-text);border-bottom-right-radius:6px;align-self:flex-end}.bubble.assistant{background:var(--surface);border:2px solid var(--border);border-bottom-left-radius:6px;align-self:flex-start}.bubble.error{background:var(--error-bg);border:2px solid var(--error-border);color:var(--error-text);align-self:flex-start}.empty{text-align:center;max-width:420px;color:var(--muted);margin:auto;padding:24px 8px}.empty p{margin:4px 0}.empty-emoji{font-size:56px;line-height:1.2}.empty-title{color:var(--text);font-size:24px;font-weight:800}.typing{color:var(--muted);align-items:center;gap:10px;font-size:16px;display:flex}.typing.after-text{margin-top:8px}.dots{gap:4px;display:inline-flex}.dots i{background:var(--accent);opacity:.35;border-radius:50%;width:8px;height:8px;animation:1.2s ease-in-out infinite bounce}.dots i:nth-child(2){animation-delay:.15s}.dots i:nth-child(3){animation-delay:.3s}@keyframes bounce{0%,80%,to{opacity:.35;transform:translateY(0)}40%{opacity:1;transform:translateY(-5px)}}@media (prefers-reduced-motion:reduce){.dots i{opacity:.6;animation:none}}.composer{padding:12px 16px max(12px, env(safe-area-inset-bottom));background:var(--surface);border-top:2px solid var(--border);align-items:flex-end;gap:10px;display:flex}.composer textarea{border:2px solid var(--border);background:var(--bg);resize:none;border-radius:26px;outline:none;flex:1;min-height:52px;padding:12px 18px;font-size:18px;line-height:1.4}.composer textarea:focus{border-color:var(--accent);background:var(--surface)}.send{background:var(--accent);width:52px;height:52px;color:var(--accent-text);border:none;border-radius:50%;flex:none;font-size:22px}.send:disabled{opacity:.35;cursor:default}.past{padding:14px 16px max(14px, env(safe-area-inset-bottom));background:var(--accent-soft);border-top:2px solid var(--border);text-align:center;flex-wrap:wrap;justify-content:center;align-items:center;gap:10px 16px;font-size:16px;display:flex}.primary{background:var(--accent);min-height:44px;color:var(--accent-text);border:none;border-radius:999px;padding:8px 20px;font-size:16px;font-weight:700}@media (width<=480px){:root{font-size:17px}.title{font-size:20px}.title-extra{display:none}.bubble{max-width:90%}}.login{max-width:360px}.login-title{margin:4px 0;font-size:26px;font-weight:800}.login-error{color:var(--error-text)}.primary.google{align-items:center;min-height:52px;margin-top:12px;padding:12px 28px;font-size:18px;text-decoration:none;display:inline-flex}