@import "https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=Roboto+Condensed:wght@400;600;700&display=swap";@import "https://fonts.googleapis.com/css2?family=Gelasio:ital,wght@0,400..700;1,400..700&family=Noto+Sans:ital,wght@0,100..900;1,100..900&display=swap";*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0d0f14;--bg-card:#13161e;--bg-elevated:#1a1e28;--border:#252934;--border-light:#2e3341;--accent:#4f7cff;--accent-hover:#6b91ff;--accent-muted:#4f7cff1f;--success:#34d399;--success-muted:#34d3991f;--warning:#fbbf24;--warning-muted:#fbbf241f;--danger:#f87171;--danger-muted:#f871711f;--text:#e8eaf0;--text-secondary:#8b90a0;--text-muted:#555b6e;--radius:10px;--radius-sm:6px;--radius-lg:16px;--shadow:0 4px 24px #0006;--font-display:"Roboto Condensed", Arial, sans-serif;--font-body:"Roboto", Arial, sans-serif;--sidebar-width:240px}html,body{background:var(--bg);height:100%;color:var(--text);font-family:var(--font-body);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.6}#app{min-height:100vh}h1,h2,h3,h4{font-family:var(--font-display);line-height:1.2}a{color:var(--accent);text-decoration:none}button{cursor:pointer;font-family:var(--font-body)}input,select,textarea{font-family:var(--font-body)}.btn{border-radius:var(--radius-sm);white-space:nowrap;border:none;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:500;transition:all .15s;display:inline-flex}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-elevated);color:var(--text);border:1px solid var(--border-light)}.btn-secondary:hover{background:var(--border)}.btn-danger{background:var(--danger-muted);color:var(--danger);border:1px solid #f8717133}.btn-danger:hover{background:#f8717133}.btn-success{background:var(--success-muted);color:var(--success);border:1px solid #34d39933}.btn-success:hover{background:#34d39933}.btn-sm{padding:6px 12px;font-size:13px}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-icon{border-radius:var(--radius-sm);background:var(--bg-elevated);border:1px solid var(--border-light);color:var(--text-secondary);padding:8px}.btn-icon:hover{color:var(--text);background:var(--border)}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}.form-group{flex-direction:column;gap:6px;display:flex}.form-group label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;font-size:13px;font-weight:500}.form-control{background:var(--bg-elevated);border:1px solid var(--border-light);border-radius:var(--radius-sm);color:var(--text);outline:none;width:100%;padding:10px 14px;font-size:14px;transition:border-color .15s}.form-control:focus{border-color:var(--accent)}.form-control::placeholder{color:var(--text-muted)}select.form-control option{background:var(--bg-elevated)}.badge{text-transform:uppercase;letter-spacing:.04em;border-radius:99px;align-items:center;padding:3px 10px;font-size:12px;font-weight:600;display:inline-flex}.badge-admin{color:var(--warning);background:#fbbf2426}.badge-teacher{color:#a78bfa;background:#a78bfa26}.badge-student{background:var(--accent-muted);color:var(--accent)}.badge-open{background:var(--success-muted);color:var(--success)}.badge-closed{background:var(--danger-muted);color:var(--danger)}.badge-pending{background:var(--bg-elevated);color:var(--text-muted)}.error-msg{background:var(--danger-muted);color:var(--danger);border-radius:var(--radius-sm);border:1px solid #f8717140;padding:10px 14px;font-size:13px}.success-msg{background:var(--success-muted);color:var(--success);border-radius:var(--radius-sm);border:1px solid #34d39940;padding:10px 14px;font-size:13px}.table-wrap{-webkit-overflow-scrolling:touch;overflow-x:auto}table{border-collapse:collapse;width:100%;min-width:500px}th{font-family:var(--font-display);text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);text-align:left;border-bottom:1px solid var(--border);white-space:nowrap;padding:10px 16px;font-size:11px;font-weight:700}td{border-bottom:1px solid var(--border);color:var(--text);padding:14px 16px;font-size:14px}tr:last-child td{border-bottom:none}tr:hover td{background:var(--bg-elevated)}.empty-state{text-align:center;color:var(--text-muted);padding:60px 20px}.empty-state p{margin-top:8px;font-size:14px}.page-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:28px;display:flex}.page-header h1{font-size:22px;font-weight:700}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;background:#0009;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal{background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius-lg);width:100%;max-width:480px;box-shadow:var(--shadow);max-height:90vh;padding:28px;overflow-y:auto}.modal h2{margin-bottom:24px;font-size:20px}.modal-footer{flex-wrap:wrap;justify-content:flex-end;gap:10px;margin-top:24px;display:flex}.spinner{border:2px solid var(--border-light);border-top-color:var(--accent);border-radius:50%;width:20px;height:20px;animation:.7s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.layout{min-height:100vh;display:flex}.main-content{min-width:0;margin-left:var(--sidebar-width);flex:1;padding:28px 24px}@media (width<=768px){.main-content{margin-left:0;padding:16px}.page-header h1{font-size:20px}.modal{padding:20px}.card{padding:16px}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:3px}@media (width<=768px){.main-content{padding-top:56px}}