/* ── Design tokens ──────────────────────────────────────────── */
:root {
    --bg:           #0f1117;
    --surface:      #1a1d27;
    --surface-alt:  #212436;
    --border:       #2a2d3a;
    --text:         #e4e4e7;
    --text-muted:   #9ca3af;
    --accent:       #6366f1;
    --accent-light: #818cf8;
    --accent-glow:  rgba(99, 102, 241, 0.15);
    --green:        #22c55e;
    --orange:       #f59e0b;
    --red:          #ef4444;
    --radius-sm:    6px;
    --radius-md:    12px;
    --radius-full:  9999px;
    --transition:   0.2s ease;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ── Base ───────────────────────────────────────────────────── */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

/* ── Header ─────────────────────────────────────────────────── */
header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.01em;
}

header h1 .icon {
    font-size: 1.4rem;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* ── Status badge ───────────────────────────────────────────── */
.status-badge {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-full);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.status-badge.connected    { background: rgba(34, 197, 94, 0.12);  color: var(--green);  border: 1px solid rgba(34, 197, 94, 0.25); }
.status-badge.disconnected { background: rgba(239, 68, 68, 0.12);  color: var(--red);    border: 1px solid rgba(239, 68, 68, 0.25); }
.status-badge.loading      { background: rgba(245, 158, 11, 0.12); color: var(--orange); border: 1px solid rgba(245, 158, 11, 0.25); }

/* ── Main layout ────────────────────────────────────────────── */
main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* ── Summary bar ────────────────────────────────────────────── */
.summary-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.summary-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.summary-card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent-glow);
}

.summary-card .label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
    font-weight: 600;
}

.summary-card .value {
    font-size: 1.9rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1;
}

.summary-card .unit {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 0;
}

/* ── Tab bar ────────────────────────────────────────────────── */
.tab-bar {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.tab-bar button {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.75rem 1.4rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
    white-space: nowrap;
}

.tab-bar button:hover { color: var(--text); }

.tab-bar button.active {
    color: var(--accent-light);
    border-bottom-color: var(--accent);
}

.tab-content          { display: none; }
.tab-content.active   { display: block; }

/* ── Toolbar ────────────────────────────────────────────────── */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.toolbar h2 {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* ── Time-range picker ──────────────────────────────────────── */
.time-range {
    display: flex;
    gap: 0.2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.2rem;
}

.time-range button {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: color var(--transition), background var(--transition);
}

.time-range button:hover { color: var(--text); background: var(--surface-alt); }

.time-range button.active {
    background: var(--accent);
    color: #fff;
}

/* ── Chart panels ───────────────────────────────────────────── */
.chart-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
    height: 320px;
    transition: border-color var(--transition);
}

.chart-panel:hover { border-color: var(--border); }

.chart-panel h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 1rem;
    letter-spacing: 0.01em;
}

.chart-panel canvas {
    width:  100% !important;
    height: 240px !important;
    max-height: 240px !important;
}

/* Per-device charts section */
#deviceCharts {
    display: grid;
    gap: 1.25rem;
}

#deviceCharts .chart-panel {
    height: 260px;
    margin-bottom: 0;
}

#deviceCharts .chart-panel canvas {
    height: 180px !important;
    max-height: 180px !important;
}

/* ── Device grid ────────────────────────────────────────────── */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.25rem;
}

.device-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.device-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

.device-card .device-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.device-card .device-name {
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.device-card .device-id {
    font-size: 0.68rem;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
    margin-top: 0.2rem;
}

/* ── Readings grid ──────────────────────────────────────────── */
.readings {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.reading {
    background: var(--accent-glow);
    border: 1px solid rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
}

.reading .reading-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 0.3rem;
    font-weight: 600;
}

.reading .reading-value {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.reading .reading-unit {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.reading .reading-time {
    font-size: 0.63rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* ── Mini sparkline ─────────────────────────────────────────── */
.device-chart-wrap {
    margin-top: 0.75rem;
    height: 120px;
}

/* ── Empty state ────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
    grid-column: 1 / -1;
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.empty-state h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-weight: 600;
}

.empty-state p {
    font-size: 0.875rem;
    max-width: 420px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
    background: var(--accent);
    color: #fff;
    border: 1px solid transparent;
    padding: 0.45rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: background var(--transition), opacity var(--transition);
    white-space: nowrap;
}

.btn:hover            { background: var(--accent-light); }
.btn:active           { opacity: 0.8; }
.btn:disabled         { opacity: 0.45; cursor: not-allowed; }

.btn.secondary {
    background: var(--surface);
    border-color: var(--border);
    color: var(--text);
}

.btn.secondary:hover  { border-color: var(--accent); color: var(--accent-light); }

/* ── Footer meta ────────────────────────────────────────────── */
.last-update {
    font-size: 0.73rem;
    color: var(--text-muted);
}

.backfill-msg {
    font-size: 0.78rem;
    display: none;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
    header { padding: 0.875rem 1.25rem; }
    main   { padding: 1.25rem; }

    .device-grid  { grid-template-columns: 1fr; }
    .summary-bar  { grid-template-columns: 1fr 1fr; }
    .sensor-panels { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .summary-bar  { grid-template-columns: 1fr; }
    .readings     { grid-template-columns: 1fr; }
    .sensor-panels { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════════════════════════════
   Thermostat / Sensor Styles
   ══════════════════════════════════════════════════════════════ */

.sensor-panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.sensor-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
}

.sensor-panel h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.sensor-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sensor-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    border: 1px solid var(--border);
    background: var(--surface-alt);
    transition: border-color var(--transition);
}

.sensor-item:hover {
    border-color: var(--accent);
}

.sensor-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.sensor-name {
    flex: 1;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sensor-state {
    font-weight: 600;
    text-transform: capitalize;
    min-width: 70px;
    text-align: right;
}

.sensor-time {
    font-size: 0.72rem;
    color: var(--text-muted);
    white-space: nowrap;
    min-width: 60px;
    text-align: right;
}

/* Sensor state colors */
.sensor-ok .sensor-state     { color: var(--green); }
.sensor-warn .sensor-state   { color: var(--orange); }
.sensor-away .sensor-state   { color: var(--text-muted); }
.sensor-temp .sensor-state   { color: var(--accent-light); }

/* Summary bar helper colors */
.text-ok   { color: var(--green); }
.text-warn { color: var(--orange); }

/* ══════════════════════════════════════════════════════════════
   Tibber-style Consumption View (Energy Delta tab)
   ══════════════════════════════════════════════════════════════ */

.consumption-view {
    max-width: 640px;
    margin: 0 auto;
    padding: 0;
}

/* ── View mode selector (Day / Month / Year) ────────────────── */
.view-mode-selector {
    display: flex;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 3px;
    margin-bottom: 1.75rem;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.view-mode-selector button {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.5rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: background var(--transition), color var(--transition);
    white-space: nowrap;
}

.view-mode-selector button:hover {
    color: var(--text);
}

.view-mode-selector button.active {
    background: var(--text);
    color: var(--bg);
}

/* ── Consumption header ─────────────────────────────────────── */
.consumption-header {
    margin-bottom: 1.25rem;
}

.consumption-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.consumption-total {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
}

.consumption-value {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--text);
}

.consumption-unit {
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* ── Display options pill ───────────────────────────────────── */
.display-options-bar {
    margin-bottom: 1.5rem;
}

.display-option-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 0.6rem 1.1rem;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
}

.display-option-pill:hover {
    border-color: var(--accent);
}

.display-option-pill.active {
    border-color: var(--text-muted);
}

.pill-close {
    font-size: 0.7rem;
    color: var(--text-muted);
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--surface-alt);
    transition: background var(--transition), color var(--transition);
    flex-shrink: 0;
}

.pill-close:hover {
    background: var(--border);
    color: var(--text);
}

/* ── Consumption chart area ─────────────────────────────────── */
.consumption-chart-area {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem 1rem 0.75rem;
    margin-bottom: 1.25rem;
    height: 320px;
    position: relative;
}

.consumption-chart-area canvas {
    width: 100% !important;
    height: 270px !important;
    max-height: 270px !important;
}

/* ── Date navigation ────────────────────────────────────────── */
.date-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.25rem;
}

.date-nav-btn {
    background: none;
    border: 2px solid var(--border);
    color: var(--text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition), opacity var(--transition);
}

.date-nav-btn:hover {
    border-color: var(--accent);
    background: var(--surface-alt);
}

.date-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.date-nav-label {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text);
    min-width: 160px;
    text-align: center;
}

/* ── Consumption summary card ───────────────────────────────── */
.consumption-summary-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    transition: border-color var(--transition);
}

.consumption-summary-card:hover {
    border-color: var(--accent);
}

.summary-card-label {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text);
}

.summary-card-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
}

/* ── Per-device breakdown ───────────────────────────────────── */
.device-breakdown {
    display: grid;
    gap: 1rem;
}

.device-breakdown .chart-panel {
    height: 260px;
    margin-bottom: 0;
}

.device-breakdown .chart-panel canvas {
    height: 180px !important;
    max-height: 180px !important;
}

/* ── Responsive adjustments for consumption view ──────────── */
@media (max-width: 640px) {
    .consumption-view {
        padding: 0;
    }

    .consumption-value {
        font-size: 2.2rem;
    }

    .date-nav-label {
        font-size: 1.1rem;
        min-width: 120px;
    }
}