:root{--ink:#1a1c1c;--muted:#434654;--border:#e7e7e7;--canvas:#f5f7fa;--surface:#f9f9f9;--nav:#001529;--primary:#0052d9;--brand:#0052d9;--brand-soft:#f0f5ff;--soft:#f4f3f3;--sidebar-width:240px}*{box-sizing:border-box}body{background:var(--canvas);color:var(--ink);margin:0;font-family:Noto Sans SC,Microsoft YaHei,Arial,sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.app-shell{grid-template-columns:var(--sidebar-width)minmax(0,1fr);min-height:100vh;display:grid}.sidebar{background:var(--nav);color:#f4f8fb;flex-direction:column;padding:24px 14px;display:flex}.brand{align-items:center;gap:12px;padding:0 10px 32px;display:flex}.brand-mark{background:var(--primary);border-radius:10px;place-items:center;width:36px;height:36px;font-weight:800;display:grid}.brand strong,.brand span{display:block}.brand strong{letter-spacing:.2px;font-size:19px}.brand span{color:#9bb7ca;margin-top:4px;font-size:12px}.sidebar nav{gap:6px;display:grid}.sidebar nav a{color:#c5d7e4;border-radius:8px;padding:12px 14px;font-weight:600}.sidebar nav a:hover{color:#fff;background:#173b60}.readonly-note{color:#a6bdcf;border-top:1px solid #294867;margin-top:auto;padding:12px;font-size:12px}.readonly-note span{color:#33c481}main{min-width:0}.topbar{border-bottom:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;height:76px;padding:0 36px;display:flex}.topbar strong{font-size:15px}.eyebrow{color:var(--brand);letter-spacing:.08em;text-transform:uppercase;margin:0 0 7px;font-size:12px;font-weight:700}.station-switcher{border:1px solid var(--border);color:var(--muted);background:#fff;border-radius:8px;align-items:center;gap:8px;padding:8px 11px;font-size:12px;display:flex}.station-switcher select{color:var(--ink);background:#fff;border:0;outline:0;font-weight:600}.page-content{max-width:1440px;margin:auto;padding:34px 38px 56px}.topbar-actions{align-items:center;gap:10px;display:flex}.logout-button{border:1px solid var(--border);color:var(--muted);cursor:pointer;background:#fff;border-radius:8px;padding:9px 12px}.login-page{background:radial-gradient(circle at top left,#e6f0ff,transparent 36%),var(--canvas);place-items:center;min-height:100vh;padding:32px 18px;display:grid}.login-card{border:1px solid var(--border);background:#fff;border-radius:18px;width:min(440px,100%);padding:36px;box-shadow:0 24px 70px #001e461a}.login-brand{align-items:center;gap:10px;margin-bottom:26px;display:flex}.login-brand strong{font-size:21px}.login-card h1{margin:8px 0 10px;font-size:30px}.login-intro{color:var(--muted);margin:0 0 22px;line-height:1.65}.login-error{color:#a52929;background:#fff0f0;border-radius:8px;margin:0 0 18px;padding:11px 13px;font-size:13px}.login-form{gap:16px;display:grid}.login-form label{color:var(--muted);gap:7px;font-size:13px;font-weight:700;display:grid}.login-form input{border:1px solid var(--border);width:100%;color:var(--ink);background:#fff;border-radius:9px;outline:none;padding:12px 13px}.login-form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}.login-form button{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:9px;margin-top:4px;padding:13px;font-weight:750}.login-card>small{color:var(--muted);margin-top:20px;line-height:1.55;display:block}.page-heading{justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:28px;display:flex}.page-heading h1{letter-spacing:-.03em;margin:0 0 9px;font-size:29px}.page-heading p:not(.eyebrow){color:var(--muted);margin:0;line-height:1.65}.status{white-space:nowrap;border-radius:999px;align-items:center;padding:7px 10px;font-size:12px;font-weight:700;display:inline-flex}.status-pending{color:#966a08;background:#fff6df}.status-neutral{color:#526274;background:#edf2f7}.status-online{color:#16713b;background:#e8f8ee}.content-card{border:1px solid var(--border);background:#fff;border-radius:14px;padding:22px}.stack-lg{gap:22px;display:grid}.stack-md{gap:12px;display:grid}.section-heading{justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.section-heading h2{margin:0 0 8px;font-size:20px}.section-heading p:not(.eyebrow){color:var(--muted);margin:0;line-height:1.65}.metric-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:0;display:grid}.metric-grid div{border:1px solid var(--border);background:var(--surface);border-radius:10px;min-width:0;padding:14px}.metric-grid dt{color:var(--muted);font-size:12px}.metric-grid dd{overflow-wrap:anywhere;margin:7px 0 0;font-weight:700}.connection-form{align-content:start}.connection-form>p{color:var(--muted);margin:0 0 2px;line-height:1.6}.connection-form>label:not(.checkbox-row){color:var(--muted);font-size:13px;font-weight:700}.connection-form input:not([type=hidden]):not([type=checkbox]){border:1px solid var(--border);width:100%;color:var(--ink);background:#fff;border-radius:9px;outline:none;padding:11px 12px}.connection-form input:not([type=hidden]):not([type=checkbox]):focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}.connection-form button{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:9px;justify-self:start;margin-top:4px;padding:11px 16px;font-weight:700}.agent-installation-panel>.section-heading>button{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:9px;padding:11px 16px;font-weight:700}.agent-installation-panel button:disabled{cursor:wait;opacity:.65}.installation-code-callout{background:var(--brand-soft);border:1px solid #b9cef6;border-radius:11px;gap:10px;padding:18px;display:grid}.installation-code-callout code{overflow-wrap:anywhere;color:var(--ink);background:#fff;border-radius:8px;padding:13px;font-size:16px;display:block}.installation-code-callout p,.empty-inline{color:var(--muted);margin:0;line-height:1.6}.text-button{color:var(--brand);cursor:pointer;background:0 0;border:0;font-weight:700}.checkbox-row{color:var(--ink);align-items:center;gap:8px;font-size:13px;font-weight:650;display:flex}.checkbox-row input{width:16px;height:16px;accent-color:var(--brand);margin:0}.overview-grid,.monitor-grid,.settings-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.metric-card,.data-panel{border:1px solid var(--border);background:#fff;border-radius:14px}.metric-card{flex-direction:column;min-height:185px;padding:22px;display:flex}.metric-card p{color:var(--muted);margin:0;font-weight:600}.metric-card strong{margin:18px 0 5px;font-family:IBM Plex Sans,Noto Sans SC,sans-serif;font-size:38px}.metric-card span{color:var(--ink);font-size:14px}.metric-card 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var(--border);background:#fff;border-radius:12px;gap:8px;width:max-content;max-width:100%;margin:0 0 16px;padding:6px;display:flex}.secondary-nav a{color:var(--muted);border-radius:8px;padding:10px 14px;font-weight:650;text-decoration:none}.secondary-nav a.active{background:var(--brand-soft);color:var(--brand)}.asset-list{gap:10px;margin:20px 0 0;padding:0;list-style:none;display:grid}.asset-list li{border-top:1px solid var(--border);justify-content:space-between;gap:18px;padding:12px 0;display:flex}.asset-list span{color:var(--muted)}.asset-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0 0;display:grid}.asset-stats div{border:1px solid var(--border);background:var(--surface);border-radius:10px;padding:14px}.asset-stats dt{color:var(--muted);font-size:13px}.asset-stats dd{color:var(--brand);margin:6px 0 0;font-size:28px;font-weight:750}.source-status{justify-items:end;gap:5px;min-width:220px;display:grid}.source-status>span,.source-status small{color:var(--muted);font-size:12px}.device-status-list{gap:10px;display:grid}.device-status-list article{border:1px solid var(--border);background:#f8fbfc;border-radius:10px;padding:12px 14px}.device-status-list article div{justify-content:space-between;align-items:center;gap:12px;display:flex}.device-status-list article span,.device-status-list article small{color:var(--muted);font-size:12px}.device-status-list article p{margin:8px 0 5px}.heading-actions{justify-items:end;gap:10px;display:grid}.filter-bar{flex-wrap:wrap;gap:12px;margin-bottom:16px;display:flex}.filter-bar label{color:var(--muted);gap:6px;font-size:12px;font-weight:700;display:grid}.filter-bar input,.filter-bar select{border:1px solid var(--border);background:#fff;border-radius:8px;min-width:150px;padding:10px 12px}.filter-bar button{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:8px;align-self:end;padding:11px 18px}.pagination{color:var(--muted);align-items:center;gap:12px;margin-top:16px;font-size:13px;display:flex}.pagination a,.pagination .disabled{border:1px solid var(--border);background:#fff;border-radius:7px;padding:8px 11px}.pagination .disabled{color:#a7b1bb;background:#f8fafc}.empty-state{text-align:center;background:#fff;border:1px dashed #cbd7df;border-radius:14px;padding:48px 28px}.empty-state h3{margin:0 0 9px;font-size:17px}.empty-state p{max-width:520px;color:var(--muted);margin:0 auto;line-height:1.65}.compact{background:var(--soft);border:0;padding:28px 18px}.table-summary{color:var(--muted);margin-bottom:14px;font-size:13px}.table-scroll{overflow:auto}table{border-collapse:collapse;width:100%;min-width:860px}th,td{text-align:left;border-bottom:1px solid var(--border);white-space:nowrap;padding:13px 12px}th{color:var(--muted);background:#f8fafc;font-size:12px;font-weight:700}td{font-size:13px}tr:last-child td{border:0}.monitor-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.monitor-grid dl{margin:18px 0 0}.monitor-grid dl div{border-top:1px solid var(--border);justify-content:space-between;padding:12px 0;display:flex}.monitor-grid dt{color:var(--muted)}.monitor-grid dd{margin:0;font-weight:600}.tab-strip{border-bottom:1px solid var(--border);gap:4px;margin-bottom:18px;display:flex}.tab-strip>*{color:var(--muted);background:0 0;border:0;padding:11px 14px;display:inline-block}.tab-strip .active{border-bottom:2px solid var(--brand);color:var(--brand);font-weight:700}.tank-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.tank-card{border:1px solid var(--border);background:#fff;border-radius:14px;padding:20px}.tank-card header{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.tank-card header p{margin:0;font-weight:700}.tank-card header div 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0;font-size:13px;display:flex}.tank-card dt{color:var(--muted)}.tank-card dd{text-align:right;margin:0}.tank-card details{border-top:1px solid var(--border);margin-top:12px}.tank-card summary{color:var(--brand);cursor:pointer;padding-top:12px;font-size:13px;font-weight:700}.settings-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.setting-links{gap:8px;margin-top:18px;display:grid}.setting-links button{text-align:left;border:0;border-top:1px solid var(--border);color:var(--ink);background:#fff;justify-content:space-between;padding:12px 0;display:flex}.setting-links span{color:var(--muted);font-size:12px}.asset-relations{grid-column:1/-1}.asset-relations ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 20px;margin:18px 0 0;padding:0;list-style:none;display:grid}.asset-relations li{border-top:1px solid var(--border);padding:10px 0;font-size:13px}.back-link{border:1px solid var(--border);color:var(--brand);background:#fff;border-radius:8px;padding:9px 12px;font-size:13px;font-weight:700}.tank-selector{flex-wrap:wrap;gap:10px;margin-bottom:18px;display:flex}.tank-selector a{border:1px solid var(--border);background:#fff;border-radius:9px;min-width:145px;padding:11px 13px;font-weight:700}.tank-selector a span{color:var(--muted);margin-top:5px;font-size:12px;font-weight:400;display:block}.tank-selector a.active{border-color:var(--brand);color:var(--brand);box-shadow:0 0 0 2px #d6f1f4}.history-panel{border:1px solid var(--border);background:#fff;border-radius:14px;padding:22px}.history-heading{justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:20px;display:flex}.history-heading h2{margin:0 0 8px;font-size:20px}.history-heading p:not(.eyebrow){color:var(--muted);margin:0;font-size:13px}.history-chart{border:1px solid var(--border);background:linear-gradient(#f5fbfc,#fff);border-radius:10px;margin-bottom:20px;padding:16px 16px 9px}.history-chart svg{width:100%;height:180px;display:block}.history-chart line{stroke:#c7d6df;stroke-width:.6px}.history-chart polyline{fill:none;stroke:var(--brand);stroke-width:1.8px;vector-effect:non-scaling-stroke}.history-chart-caption{color:var(--muted);justify-content:space-between;gap:20px;font-size:11px;display:flex}@media (max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{display:none}.page-content{padding:24px 18px}.topbar{padding:0 18px}.overview-grid,.monitor-grid,.settings-grid,.tank-grid,.metric-grid{grid-template-columns:1fr}.page-heading,.overview-callout,.recent-fueling-heading,.section-heading{flex-direction:column;align-items:flex-start}.recent-fueling-list li{grid-template-columns:1fr;gap:7px}.recent-fueling-list time{text-align:left}}