:root {
    color-scheme: light dark;
    --bg: #f5f5f7;
    --card: #ffffff;
    --border: #e3e3e8;
    --text: #1a1a1d;
    --muted: #6e6e76;
    --accent: #2563eb;
    --accent-fg: #ffffff;
    --good: #16a34a;
    --warn: #ea580c;
    --bad: #dc2626;
    --shadow: 0 2px 8px rgba(0,0,0,0.04);
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #15171c;
        --card: #1d2027;
        --border: #2c303a;
        --text: #e7e8eb;
        --muted: #9aa0aa;
        --shadow: 0 2px 8px rgba(0,0,0,0.4);
    }
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
}
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
header h1 { margin: 0; font-size: 18px; font-weight: 600; }
.header-right { display: flex; align-items: center; gap: 12px; }
.muted { color: var(--muted); font-size: 12px; }
.user { font-size: 13px; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 16px;
    padding: 20px;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.card h2 { margin: 0; font-size: 16px; font-weight: 600; }
.card .subtitle { color: var(--muted); font-size: 12px; margin-top: -8px; }

.metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}
.metric {
    background: var(--bg);
    border-radius: 8px;
    padding: 8px;
    text-align: center;
}
.metric .label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.metric .value { font-size: 18px; font-weight: 600; margin-top: 2px; }
.metric .unit  { font-size: 11px; color: var(--muted); }

.mode-row, .fan-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
button.mode, button.fan {
    flex: 1 1 auto;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
}
button.mode:hover, button.fan:hover { background: var(--bg); }
button.mode.active, button.fan.active {
    background: var(--accent);
    color: var(--accent-fg);
    border-color: var(--accent);
}
button[disabled] { opacity: 0.5; cursor: wait; }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 500;
}
.badge.good { background: rgba(22,163,74,.15); color: var(--good); }
.badge.warn { background: rgba(234,88,12,.15); color: var(--warn); }
.badge.bad  { background: rgba(220,38,38,.15); color: var(--bad); }
.badge.muted { background: rgba(127,127,127,.15); color: var(--muted); }

.chart-wrap { position: relative; height: 160px; }

.house-card .device-list {
    border-top: 1px solid var(--border);
    padding-top: 8px;
    margin-top: 4px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.house-card .device-row {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    gap: 8px;
    align-items: center;
    font-size: 12px;
}
.house-card .device-row .swatch {
    width: 10px; height: 10px; border-radius: 50%;
    flex-shrink: 0;
}
.house-card .device-row .device-name { font-weight: 500; color: var(--text); }
.house-card .device-row .device-readings { color: var(--text); font-variant-numeric: tabular-nums; }

.auto-cool-card {
    border-top: 3px solid var(--accent);
}
.auto-cool-card.active {
    border-top-color: var(--good);
}
.auto-cool-card.disabled {
    opacity: 0.7;
    border-top-color: var(--muted);
}
.auto-cool-card h2 .dot {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--muted);
    margin-right: 6px;
    vertical-align: middle;
}
.auto-cool-card.active h2 .dot { background: var(--good); }

.auto-cool-card .settings-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 6px 10px;
    font-size: 13px;
    align-items: center;
}
.auto-cool-card .settings-grid label {
    color: var(--muted);
}
.auto-cool-card input[type="number"],
.auto-cool-card input[type="time"],
.auto-cool-card select {
    width: 100%;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    padding: 4px 6px;
    border-radius: 4px;
    font: inherit;
    font-size: 12px;
}
.auto-cool-card .pair {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}
.auto-cool-card .section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin: 8px 0 2px;
}
.auto-cool-card .actions {
    display: flex;
    gap: 6px;
    justify-content: flex-end;
}
.auto-cool-card .actions button.primary {
    background: var(--accent);
    color: var(--accent-fg);
    border: 0;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font: inherit;
    font-size: 13px;
}

.toggle {
    --w: 34px;
    --h: 20px;
    position: relative;
    display: inline-block;
    width: var(--w);
    height: var(--h);
    flex: 0 0 var(--w);
}
.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}
.toggle .slider {
    position: absolute;
    inset: 0;
    background: var(--border);
    border-radius: 999px;
    transition: 0.15s;
    cursor: pointer;
}
.toggle .slider::before {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    left: 2px;
    bottom: 2px;
    background: white;
    border-radius: 50%;
    transition: 0.15s;
}
.toggle input:checked + .slider {
    background: var(--accent);
}
.toggle input:checked + .slider::before {
    transform: translateX(14px);
}

.sessions-list {
    font-size: 12px;
    color: var(--muted);
    max-height: 140px;
    overflow-y: auto;
    border-top: 1px solid var(--border);
    padding-top: 8px;
    margin-top: 4px;
}
.sessions-list .session {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 8px;
    padding: 4px 0;
    border-bottom: 1px dashed var(--border);
}
.sessions-list .session:last-child { border-bottom: 0; }
.sessions-list .delta-good { color: var(--good); font-weight: 600; }
.sessions-list .delta-bad  { color: var(--muted); }
.sessions-list .delta-empty { color: var(--muted); }
.sessions-list .live { color: var(--accent); font-weight: 600; }

.summary-row {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--muted);
    flex-wrap: wrap;
}
.summary-row strong { color: var(--text); font-weight: 600; }

.btn-ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
}
.btn-ghost:hover { background: var(--bg); }

/* login page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    width: min(360px, 90vw);
    box-shadow: var(--shadow);
}
.login-card h1 { margin: 0 0 16px; font-size: 22px; }
.login-card form { display: flex; flex-direction: column; gap: 12px; }
.login-card label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
.login-card input {
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    padding: 10px;
    border-radius: 8px;
    font: inherit;
}
.login-card button {
    background: var(--accent);
    color: var(--accent-fg);
    border: 0;
    padding: 10px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}
.error { color: var(--bad); font-size: 13px; margin: 0; }