:root{--bg: #0a0a1a;--card: #1a1a2e;--accent: #4fc3f7;--success: #4CAF50;--danger: #f44336;--warning: #ff9800;--text: #ffffff;--text-dim: #aaaaaa}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.landing-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.landing-card{background:var(--card);border-radius:16px;padding:32px 24px;width:100%;max-width:360px;text-align:center;box-shadow:0 0 30px #4fc3f726}.landing-icon{font-size:48px}.landing-subtitle{color:var(--text-dim);margin-bottom:20px}.landing-input{width:100%;padding:14px;font-size:16px;border-radius:8px;border:1px solid #333;background:#0f0f24;color:var(--text);margin-bottom:12px;min-height:44px}.landing-button{width:100%;min-height:44px;background:var(--accent);color:#001018;border:none;border-radius:8px;font-weight:600;font-size:16px;cursor:pointer;transition:opacity .2s}.landing-button:disabled{opacity:.6}.landing-error{color:var(--danger);margin-bottom:10px;font-size:14px}.dashboard{max-width:1200px;margin:0 auto;padding:16px 16px 80px}.dashboard-header h1{font-size:20px;margin:8px 0 16px}.status-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.status-pill{background:var(--card);padding:6px 12px;border-radius:20px;font-size:12px;color:var(--text-dim)}.mqtt-connected{color:var(--success)}.mqtt-connecting{color:var(--warning)}.mqtt-disconnected,.mqtt-error{color:var(--danger)}.sensor-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:20px}.sensor-card{background:var(--card);border-radius:12px;padding:14px;border:1px solid transparent;transition:border-color .3s}.sensor-card.status-warning{border-color:var(--warning)}.sensor-card.status-critical{border-color:var(--danger);animation:pulse 1.5s infinite}@keyframes pulse{0%,to{box-shadow:0 0 #f4433600}50%{box-shadow:0 0 12px #f4433699}}.sensor-card-header{display:flex;align-items:center;gap:6px;margin-bottom:8px;color:var(--text-dim);font-size:13px}.sensor-icon{font-size:18px}.sensor-value{font-size:28px;font-weight:700;color:var(--accent)}.sensor-unit{font-size:14px;margin-left:4px;color:var(--text-dim)}.sensor-status-row{display:flex;align-items:center;gap:6px;margin-top:6px;font-size:12px}.status-dot{width:8px;height:8px;border-radius:50%;background:var(--success)}.status-dot.status-warning{background:var(--warning)}.status-dot.status-critical{background:var(--danger)}.status-dot.status-unknown{background:#555}.sensor-timestamp{font-size:11px;color:var(--text-dim);margin-top:4px}.relay-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-bottom:24px}.relay-button{min-height:60px;border-radius:12px;border:none;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;font-weight:600;transition:transform .15s,background .3s}.relay-button:active{transform:scale(.96)}.relay-on{background:var(--success);color:#06210a}.relay-off{background:var(--danger);color:#2a0505}.relay-button:disabled{opacity:.5;cursor:not-allowed}.charts-section{background:var(--card);border-radius:12px;padding:16px;margin-bottom:24px}.charts-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:8px}.range-selector{display:flex;gap:6px}.range-btn{background:#0f0f24;color:var(--text-dim);border:1px solid #333;border-radius:6px;padding:6px 10px;cursor:pointer;min-height:32px}.range-btn.active{background:var(--accent);color:#001018;border-color:var(--accent)}.chart-stats{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--text-dim);margin-bottom:10px}.chart-loading{text-align:center;padding:40px;color:var(--text-dim)}.app-footer{position:fixed;bottom:0;left:0;right:0;background:var(--card);display:flex;justify-content:space-between;align-items:center;padding:10px 16px;font-size:12px;color:var(--text-dim)}.gear-btn{background:none;border:none;font-size:20px;cursor:pointer;min-width:44px;min-height:44px}.settings-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:flex-end;justify-content:center;z-index:100}.settings-panel{background:var(--card);width:100%;max-width:480px;max-height:90vh;overflow-y:auto;border-radius:16px 16px 0 0;padding:20px}.settings-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.close-btn{background:none;border:none;color:var(--text);font-size:20px;cursor:pointer;min-width:44px;min-height:44px}.settings-panel section{margin-bottom:20px}.settings-panel label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:10px}.settings-panel input{display:block;width:100%;margin-top:4px;padding:10px;border-radius:6px;border:1px solid #333;background:#0f0f24;color:var(--text);min-height:40px}.settings-panel button{min-height:44px;margin:4px 4px 4px 0;border-radius:8px;border:none;padding:0 16px;cursor:pointer}.save-btn{background:var(--accent);color:#001018;font-weight:600;width:100%}.danger-btn{background:var(--danger);color:#fff}.export-btn{display:inline-block;background:#333;color:var(--text);text-decoration:none;padding:10px 16px;border-radius:8px}.settings-status{text-align:center;margin-top:12px;color:var(--accent);font-size:13px}@media (min-width: 640px){.settings-overlay{align-items:center}.settings-panel{border-radius:16px}}