:root{--bg: #f6f7fb;--surface: #ffffff;--surface-2: #fafbff;--surface-3: #eef1f7;--border: #e2e5ee;--text: #1c2233;--muted: #7b8399;--primary: #4f46e5;--primary-contrast: #ffffff;--primary-soft: #eef2ff;--danger: #dc2626;--danger-soft: #fef2f2;--danger-border: #fecaca;color-scheme:light}:root[data-theme=dark]{--bg: #0e1016;--surface: #161922;--surface-2: #1b1f2a;--surface-3: #232838;--border: #2a2f3d;--text: #e6e8ef;--muted: #8b93a7;--primary: #818cf8;--primary-contrast: #10121a;--primary-soft: #262b45;--danger: #f87171;--danger-soft: #3a1f24;--danger-border: #5b2a2a;color-scheme:dark}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);transition:background .15s ease,color .15s ease}button{font:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:6px 12px}button:hover:not(:disabled){border-color:var(--primary)}button:disabled{opacity:.5;cursor:not-allowed}button.active,button.ghost.active{background:var(--primary);border-color:var(--primary);color:var(--primary-contrast)}button.primary{background:var(--primary);border-color:var(--primary);color:var(--primary-contrast);font-weight:600;padding:9px 14px}input,textarea,select{font:inherit;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);resize:vertical}select{resize:none;cursor:pointer}input::placeholder,textarea::placeholder{color:var(--muted)}.muted{color:var(--muted)}.tiny{font-size:12px}.error,.banner.error{color:var(--danger)}.banner.error{margin:0 0 12px;padding:10px 14px;background:var(--danger-soft);border:1px solid var(--danger-border);border-radius:8px}.link{border:none;background:none;padding:2px 4px;color:var(--primary)}.link.danger{color:var(--danger)}.divider{height:1px;background:var(--border);margin:16px 0}.app{max-width:1400px;margin:0 auto;padding:20px 24px 40px}.splash{min-height:100vh;display:grid;place-items:center;font-weight:600}.topbar{display:flex;align-items:center;gap:16px;padding:8px 0 20px;flex-wrap:wrap}.brand h1{margin:0;font-size:22px}.month-nav{display:flex;align-items:center;gap:8px;margin-left:auto}.month-label{min-width:150px;text-align:center;font-weight:600}.user-actions{display:flex;align-items:center;gap:8px}.user-chip{display:flex;align-items:center;gap:6px;padding:4px 8px;border:1px solid var(--border);border-radius:999px;background:var(--surface)}.user-name{font-weight:600;font-size:13px}.role-badge{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:2px 6px;border-radius:999px;background:var(--primary-soft);color:var(--primary)}.theme-toggle{font-size:15px;line-height:1;padding:7px 10px}.theme-toggle.floating{position:fixed;top:18px;right:18px;z-index:5}.subjects-bar{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:16px}.layout{display:grid;grid-template-columns:1fr 400px;gap:20px;align-items:start}@media (max-width: 980px){.layout{grid-template-columns:1fr}}.calendar-wrap{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px}.calendar-head{margin-bottom:8px}.calendar-title{font-size:18px;font-weight:600}.weekday-row,.grid{display:grid;grid-template-columns:repeat(7,1fr)}.weekday{padding:6px 8px;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.grid{border-top:1px solid var(--border);border-left:1px solid var(--border)}.cell{min-height:118px;border-right:1px solid var(--border);border-bottom:1px solid var(--border);padding:6px;display:flex;flex-direction:column;gap:4px}.cell-empty{background:var(--surface-2)}.cell-today .cell-date{background:var(--primary);color:var(--primary-contrast);border-radius:999px}.cell-date{font-size:12px;font-weight:600;width:22px;height:22px;display:grid;place-items:center}.cell-slots{display:flex;flex-direction:column;gap:3px;overflow:hidden}.slot{display:flex;align-items:center;justify-content:space-between;gap:4px;font-size:11px;font-weight:600;padding:3px 6px;border-radius:6px;border:1px dashed var(--border);background:transparent;text-align:left;overflow:hidden}.slot-empty{background:var(--surface)}.slot-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.slot-count{font-size:10px;opacity:.9}.slot-comment{font-size:10px;flex-shrink:0}.slot-selected{outline:2px solid var(--text);outline-offset:1px}.calendar-foot{padding-top:10px}.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;min-height:300px;display:flex;flex-direction:column}.panel-head{padding:16px;border-bottom:1px solid var(--border)}.panel-subject{font-size:16px;font-weight:600}.panel-body{padding:16px}.stack{display:flex;flex-direction:column;gap:12px}.kind-toggle{display:flex;gap:8px}.kind-toggle button{flex:1}.kind-toggle button.active{background:var(--primary);border-color:var(--primary);color:var(--primary-contrast)}.file-picker{display:inline-flex;align-items:center;justify-content:center;padding:10px;border:1px dashed var(--border);border-radius:8px;cursor:pointer;background:var(--surface-2)}.file-picker input{display:none}.staged-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.staged-list li{display:flex;align-items:center;gap:6px;font-size:13px;border:1px solid var(--border);border-radius:8px;padding:4px 8px}.staged-list button{padding:2px 8px}.staged-index{color:var(--muted);width:16px}.staged-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.note-meta{display:flex;align-items:center;gap:10px}.note-meta 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