*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-bg: #0f1117;--color-surface: #1a1d27;--color-surface-2: #22263a;--color-border: #2e3349;--color-text: #e8eaf2;--color-text-muted: #8b90a8;--color-primary: #6c7cf7;--color-primary-light: #8b99ff;--color-green: #34d399;--color-yellow: #fbbf24;--color-red: #f87171;--color-pm25: #818cf8;--color-temp: #fb923c;--color-hum: #38bdf8;--radius: 12px;--radius-sm: 8px;--shadow: 0 4px 24px rgba(0,0,0,.4)}body{font-family:Inter,system-ui,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.5;min-height:100vh}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none;font-family:inherit}input{font-family:inherit}.container{max-width:1200px;margin:0 auto;padding:0 24px}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(ellipse at 50% 0%,rgba(108,124,247,.15) 0%,transparent 60%)}.auth-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:48px 40px;width:100%;max-width:400px;box-shadow:var(--shadow)}.auth-logo{display:flex;align-items:center;gap:10px;margin-bottom:32px}.auth-logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--color-primary),#a78bfa);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px}.auth-logo-text{font-size:22px;font-weight:700;letter-spacing:-.5px}.auth-title{font-size:24px;font-weight:700;margin-bottom:8px}.auth-subtitle{color:var(--color-text-muted);font-size:14px;margin-bottom:32px}.form-group{margin-bottom:20px}.form-label{display:block;font-size:13px;font-weight:500;color:var(--color-text-muted);margin-bottom:8px;letter-spacing:.3px}.form-input{width:100%;padding:12px 16px;background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);font-size:15px;transition:border-color .15s;outline:none}.form-input:focus{border-color:var(--color-primary)}.form-input::placeholder{color:var(--color-text-muted)}.btn-primary{width:100%;padding:13px;background:var(--color-primary);color:#fff;font-size:15px;font-weight:600;border-radius:var(--radius-sm);transition:background .15s,transform .1s;margin-top:8px}.btn-primary:hover{background:var(--color-primary-light)}.btn-primary:active{transform:scale(.98)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.error-msg{background:#f871711f;border:1px solid rgba(248,113,113,.3);color:var(--color-red);padding:12px 16px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:20px}.layout{min-height:100vh;display:flex;flex-direction:column}.navbar{background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:0 24px;height:60px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100}.navbar-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700}.navbar-brand-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--color-primary),#a78bfa);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px}.navbar-right{display:flex;align-items:center;gap:16px}.navbar-user{font-size:14px;color:var(--color-text-muted)}.btn-ghost{padding:8px 16px;background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text-muted);font-size:14px;font-weight:500;transition:border-color .15s,color .15s}.btn-ghost:hover{border-color:var(--color-text-muted);color:var(--color-text)}.main-content{flex:1;padding:32px 24px;max-width:1200px;width:100%;margin:0 auto}.page-header{margin-bottom:32px}.page-title{font-size:26px;font-weight:700;letter-spacing:-.5px}.page-subtitle{color:var(--color-text-muted);font-size:14px;margin-top:4px}.devices-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}.device-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:24px;transition:border-color .15s,transform .15s;cursor:pointer}.device-card:hover{border-color:var(--color-primary);transform:translateY(-2px)}.device-card-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:20px}.device-name{font-size:16px;font-weight:600}.device-location{font-size:13px;color:var(--color-text-muted);margin-top:2px}.status-dot{width:9px;height:9px;border-radius:50%;margin-top:5px;flex-shrink:0}.status-online{background:var(--color-green);box-shadow:0 0 8px var(--color-green)}.status-offline{background:var(--color-text-muted)}.metrics-row{display:flex;gap:16px}.metric{flex:1;background:var(--color-surface-2);border-radius:var(--radius-sm);padding:12px 14px}.metric-label{font-size:11px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;color:var(--color-text-muted);margin-bottom:6px}.metric-value{font-size:22px;font-weight:700;letter-spacing:-.5px}.metric-unit{font-size:12px;color:var(--color-text-muted);margin-left:2px;font-weight:400}.metric-pm25 .metric-value{color:var(--color-pm25)}.metric-temp .metric-value{color:var(--color-temp)}.metric-hum .metric-value{color:var(--color-hum)}.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--color-text-muted);font-size:14px;margin-bottom:24px;transition:color .15s}.back-link:hover{color:var(--color-text)}.device-detail-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-bottom:32px}.device-detail-meta{display:flex;align-items:center;gap:12px}.range-selector{display:flex;gap:8px}.range-btn{padding:7px 16px;background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text-muted);font-size:13px;font-weight:500;transition:all .15s}.range-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.range-btn.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.charts-grid{display:grid;grid-template-columns:1fr;gap:20px}.chart-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:24px}.chart-title{font-size:15px;font-weight:600;margin-bottom:4px}.chart-subtitle{font-size:13px;color:var(--color-text-muted);margin-bottom:24px}.latest-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;margin-bottom:32px}.latest-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px 24px;display:flex;flex-direction:column;gap:8px}.latest-label{font-size:12px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;color:var(--color-text-muted)}.latest-value{font-size:32px;font-weight:700;letter-spacing:-1px}.latest-unit{font-size:13px;color:var(--color-text-muted);font-weight:400;margin-left:3px}.loading{display:flex;align-items:center;justify-content:center;padding:80px;color:var(--color-text-muted);font-size:15px}.empty-state{text-align:center;padding:80px 24px;color:var(--color-text-muted)}.empty-state h3{font-size:18px;font-weight:600;color:var(--color-text);margin-bottom:8px}.empty-state p{font-size:14px}.aqi-pill{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600}.aqi-good{background:#34d39926;color:var(--color-green)}.aqi-moderate{background:#fbbf2426;color:var(--color-yellow)}.aqi-poor{background:#f8717126;color:var(--color-red)}@media (max-width: 600px){.auth-card{padding:32px 24px}.main-content{padding:24px 16px}.metrics-row{flex-direction:column}.device-detail-header{flex-direction:column;align-items:flex-start}}.admin-tabs{display:flex;gap:4px;border-bottom:1px solid var(--color-border);margin-bottom:32px}.admin-tab{padding:10px 20px;background:transparent;border:none;border-bottom:2px solid transparent;color:var(--color-text-muted);font-size:14px;font-weight:500;cursor:pointer;margin-bottom:-1px;transition:color .15s,border-color .15s}.admin-tab:hover{color:var(--color-text)}.admin-tab.active{color:var(--color-primary);border-bottom-color:var(--color-primary)}.admin-section{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:24px;margin-bottom:24px}.admin-section-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}.admin-section-title{font-size:16px;font-weight:600}.admin-badge{background:var(--color-surface-2);border:1px solid var(--color-border);color:var(--color-text-muted);font-size:12px;font-weight:600;padding:2px 8px;border-radius:20px}.admin-badge-green{background:#34d3991a;border-color:#34d3994d;color:var(--color-green)}.admin-table-wrap{overflow-x:auto}.admin-table{width:100%;border-collapse:collapse;font-size:14px}.admin-table th{text-align:left;padding:10px 12px;font-size:11px;font-weight:600;letter-spacing:.6px;text-transform:uppercase;color:var(--color-text-muted);border-bottom:1px solid var(--color-border)}.admin-table td{padding:12px;border-bottom:1px solid var(--color-border);vertical-align:middle}.admin-table tr:last-child td{border-bottom:none}.admin-table tr:hover td{background:#ffffff05}.td-muted{color:var(--color-text-muted);font-size:13px}.td-customer{display:flex;flex-direction:column;gap:2px}.device-id-code{font-family:Menlo,Consolas,monospace;font-size:13px;background:var(--color-surface-2);padding:2px 8px;border-radius:4px;color:var(--color-primary-light)}.customer-chip{font-weight:500;font-size:13px}.admin-select{background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);padding:7px 10px;font-size:13px;font-family:inherit;min-width:180px;cursor:pointer;outline:none;transition:border-color .15s}.admin-select:focus{border-color:var(--color-primary)}.admin-inline-input{background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);padding:7px 10px;font-size:13px;font-family:inherit;width:100%;min-width:140px;outline:none;transition:border-color .15s}.admin-inline-input:focus{border-color:var(--color-primary)}.admin-inline-input::placeholder{color:var(--color-text-muted)}.btn-assign{padding:7px 16px;background:var(--color-primary);color:#fff;font-size:13px;font-weight:600;border-radius:var(--radius-sm);border:none;cursor:pointer;white-space:nowrap;transition:background .15s}.btn-assign:hover{background:var(--color-primary-light)}.btn-assign:disabled{opacity:.45;cursor:not-allowed}.admin-empty{color:var(--color-text-muted);font-size:14px;padding:16px 0 4px}.admin-msg{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:24px}.admin-msg-ok{background:#34d3991a;border:1px solid rgba(52,211,153,.3);color:var(--color-green)}.admin-msg-error{background:#f871711a;border:1px solid rgba(248,113,113,.3);color:var(--color-red)}.admin-msg-close{background:none;border:none;color:inherit;font-size:18px;line-height:1;cursor:pointer;padding:0 4px;opacity:.7}.admin-msg-close:hover{opacity:1}.admin-form{display:flex;flex-direction:column;gap:0}.admin-form-row{display:flex;gap:16px;flex-wrap:wrap}.admin-form-row .form-group{margin-bottom:16px}.admin-form-footer{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:4px}.admin-checkbox-label{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--color-text-muted);cursor:pointer}.admin-checkbox-label input[type=checkbox]{width:16px;height:16px;accent-color:var(--color-primary);cursor:pointer}.role-badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}.role-admin{background:#6c7cf726;color:var(--color-primary-light)}.role-customer{background:var(--color-surface-2);color:var(--color-text-muted)}.navbar-admin-link{padding:6px 14px;background:#6c7cf71f;border:1px solid rgba(108,124,247,.3);border-radius:var(--radius-sm);color:var(--color-primary-light);font-size:13px;font-weight:500;cursor:pointer;transition:background .15s;text-decoration:none}.navbar-admin-link:hover{background:#6c7cf733}