:root{--bg: #0f172a;--bg-card: #1e293b;--bg-card-hover: #273449;--text: #f1f5f9;--text-muted: #94a3b8;--border: #334155;--green: #22c55e;--red: #ef4444;--amber: #f59e0b;--blue: #3b82f6}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px}.app{max-width:1400px;margin:0 auto;padding:24px}.app-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}.app-header h1{font-size:22px;margin:0}.header-stats{display:flex;gap:16px;align-items:center}.stat{font-weight:600}.stat-up{color:var(--green)}.stat-down{color:var(--red)}.stat-unknown{color:var(--text-muted)}.ws-indicator{font-size:12px;padding:4px 8px;border-radius:4px}.ws-indicator.connected{color:var(--green)}.ws-indicator.disconnected{color:var(--text-muted)}.toolbar{display:flex;gap:12px;margin-bottom:16px;align-items:center;flex-wrap:wrap}.search-input{flex:1 1 220px;min-width:200px;background:var(--bg-card);border:1px solid var(--border);color:var(--text);padding:8px 12px;border-radius:6px;font-size:13px;outline:none}.search-input:focus{border-color:var(--blue)}.search-input::placeholder{color:var(--text-muted)}.filter-group{display:flex;gap:6px}.filter-pill{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;background:var(--bg-card);border:1px solid var(--border);border-radius:6px;color:var(--text-muted);cursor:pointer;font-size:12px;font-weight:500;transition:all .15s}.filter-pill:hover{background:var(--bg-card-hover);color:var(--text)}.filter-pill.active{background:var(--blue);border-color:var(--blue);color:#fff}.filter-pill .filter-count{display:inline-flex;align-items:center;justify-content:center;min-width:22px;padding:1px 6px;background:#ffffff14;border-radius:10px;font-size:11px;font-weight:600}.filter-pill.active .filter-count{background:#ffffff40}.filter-pill.pill-up:not(.active){color:var(--green)}.filter-pill.pill-down:not(.active){color:var(--red)}.filter-pill.pill-checking:not(.active){color:var(--amber)}.check-all-btn{margin-left:auto}button{background:var(--blue);color:#fff;border:none;padding:8px 16px;border-radius:6px;font-weight:500;cursor:pointer;font-size:14px}button:hover:not(:disabled){filter:brightness(1.1)}button:disabled{opacity:.5;cursor:not-allowed}button.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}.school-list-wrap{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;overflow:hidden}.school-list{width:100%;border-collapse:collapse;font-size:13px}.school-list thead{background:#0003;color:var(--text-muted);text-align:left;font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.04em}.school-list th{padding:10px 12px;border-bottom:1px solid var(--border)}.school-list td{padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:middle}.school-list tr:last-child td{border-bottom:none}.school-list tr.school-row:hover{background:var(--bg-card-hover)}.school-list .col-status{width:24px}.school-list .col-name{width:18%}.school-list .col-url a{color:var(--text-muted);text-decoration:none;font-size:12px;word-break:break-all}.school-list .col-url a:hover{color:var(--blue)}.school-list .col-status-text{width:90px}.school-list .col-time{min-width:88px;white-space:nowrap;color:var(--text-muted);font-variant-numeric:tabular-nums}.school-list .col-retry{width:88px;color:var(--text-muted);font-variant-numeric:tabular-nums}.school-list .col-latency{width:80px;color:var(--text-muted)}.school-list .col-failures{width:80px;color:var(--amber)}.school-list .col-actions{width:100px;text-align:right}.school-list .col-actions button{padding:4px 10px;font-size:12px}.status-dot{display:inline-block;width:10px;height:10px;border-radius:50%}.status-dot.status-green{background:var(--green);box-shadow:0 0 6px var(--green)}.status-dot.status-red{background:var(--red);box-shadow:0 0 6px var(--red)}.status-dot.status-amber{background:var(--amber)}.status-dot.status-checking{background:var(--amber);animation:pulse 1.4s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.85)}}.status-text.status-green{color:var(--green);font-weight:600}.status-text.status-red{color:var(--red);font-weight:600}.status-text.status-amber{color:var(--amber);font-weight:600}.status-text.status-checking{color:var(--amber);font-weight:600;opacity:.85}.stat-checking{color:var(--amber)}.alerted-badge{display:inline-block;margin-left:8px;padding:2px 6px;font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--red);background:#ef44441f;border:1px solid rgba(239,68,68,.35);border-radius:3px}.error-row td{padding-top:0}.error-line{font-size:11px;color:var(--red);word-break:break-word;opacity:.85}.add-school-button{background:var(--green)}.add-school-form{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:20px;margin-bottom:16px;display:flex;flex-direction:column;gap:12px;max-width:600px}.add-school-form h3{margin:0}.add-school-form label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--text-muted)}.add-school-form input{background:var(--bg);border:1px solid var(--border);color:var(--text);padding:8px;border-radius:4px;font-size:14px}.hint{font-size:11px;opacity:.7}.form-actions{display:flex;gap:8px}.empty{text-align:center;padding:48px;color:var(--text-muted)}.error-banner{background:#ef44441a;border:1px solid var(--red);color:var(--red);padding:12px;border-radius:6px;margin-bottom:16px}