:root,
:root[data-theme="light"] {
    color-scheme: light;
    --bg: oklch(0.977 0.008 80);
    --panel: oklch(0.995 0.004 80);
    --fg: oklch(0.23 0.012 60);
    --muted: oklch(0.52 0.015 60);
    --line: oklch(0.895 0.01 80);
    --accent: oklch(0.62 0.14 250);
    --accent-hover: oklch(0.52 0.14 250);
    --selected: oklch(0.93 0.01 80);
    --c-low: oklch(0.55 0.14 150);
    --c-medium: oklch(0.66 0.13 85);
    --c-high: oklch(0.55 0.16 27);
}
:root[data-theme="auto"] {
    color-scheme: light dark;
}
:root[data-theme="dark"] {
    color-scheme: dark;
}
:root[data-theme="dark"],
:root[data-theme="auto"] {
    --dark-bg: oklch(0.185 0.012 60);
    --dark-panel: oklch(0.225 0.012 60);
    --dark-fg: oklch(0.94 0.008 80);
    --dark-muted: oklch(0.67 0.012 70);
    --dark-line: oklch(0.32 0.012 60);
    --dark-accent: oklch(0.72 0.12 250);
    --dark-accent-hover: oklch(0.82 0.12 250);
    --dark-selected: oklch(0.32 0.012 60);
    --dark-c-low: oklch(0.74 0.13 150);
    --dark-c-medium: oklch(0.79 0.12 85);
    --dark-c-high: oklch(0.70 0.15 27);
}
:root[data-theme="dark"] {
    --bg: var(--dark-bg);
    --panel: var(--dark-panel);
    --fg: var(--dark-fg);
    --muted: var(--dark-muted);
    --line: var(--dark-line);
    --accent: var(--dark-accent);
    --accent-hover: var(--dark-accent-hover);
    --selected: var(--dark-selected);
    --c-low: var(--dark-c-low);
    --c-medium: var(--dark-c-medium);
    --c-high: var(--dark-c-high);
}
@media (prefers-color-scheme: dark) {
    :root[data-theme="auto"] {
        --bg: var(--dark-bg);
        --panel: var(--dark-panel);
        --fg: var(--dark-fg);
        --muted: var(--dark-muted);
        --line: var(--dark-line);
        --accent: var(--dark-accent);
        --accent-hover: var(--dark-accent-hover);
        --selected: var(--dark-selected);
        --c-low: var(--dark-c-low);
        --c-medium: var(--dark-c-medium);
        --c-high: var(--dark-c-high);
    }
}

:root {
    --sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

.low {
    --level: var(--c-low);
}
.medium {
    --level: var(--c-medium);
}
.high {
    --level: var(--c-high);
}

body {
    margin: 0;
    padding: 40px 24px 64px;
    min-height: 100vh;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--sans);
}
a {
    color: var(--accent);
    text-decoration: none;
}
a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}
[hidden] {
    display: none !important;
}

.page {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 28px;
}
.header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
}
.header h1 {
    margin: 0;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.subtitle {
    margin: 4px 0 0;
    font-size: 14px;
    color: var(--muted);
}
.card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 24px;
}
.card h2 {
    margin: 0 0 20px;
    font-size: 15px;
    font-weight: 600;
}

button,
input,
select {
    font-family: inherit;
    color: var(--fg);
}
.control {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 14px;
    font-weight: 500;
}
button.control,
select.control {
    cursor: pointer;
}
button.control:hover:not(:disabled),
select.control:hover {
    border-color: var(--muted);
}

.controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}
.day-selector {
    display: flex;
    align-items: center;
    gap: 6px;
}
.day-selector input {
    font-family: var(--mono);
}
.arrow {
    padding: 8px 12px;
    line-height: 1;
    font-size: 16px;
}
.arrow:disabled {
    opacity: 0.4;
    cursor: default;
}
.view-selector {
    margin-left: auto;
    display: flex;
    gap: 4px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 3px;
}
.view-selector button {
    border: none;
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    background: transparent;
    color: var(--muted);
}
.view-selector button.active {
    background: var(--selected);
    color: var(--fg);
}

.day-info {
    margin: -12px 0 0;
    font-size: 13px;
    color: var(--muted);
}
.error {
    margin: -12px 0 0;
    font-size: 13px;
    color: var(--c-high);
}

.now-panel {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 24px;
    padding: 20px 24px;
}
.now-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}
.now-price {
    display: block;
    margin-top: 2px;
    font-family: var(--mono);
    font-size: 40px;
    font-weight: 600;
    letter-spacing: -0.02em;
}
.now-price .unit {
    font-size: 16px;
    font-weight: 400;
    color: var(--muted);
}
.badge {
    font-size: 13px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 999px;
    color: var(--level);
    background: color-mix(in oklch, var(--level) 14%, transparent);
}

.chart {
    position: relative;
    height: 240px;
}
.chart-grid {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.chart-grid div {
    border-top: 1px dashed var(--line);
    padding-top: 2px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
}
.chart-grid div:last-child {
    border-top: 1px solid var(--line);
}
.chart-plot {
    position: absolute;
    inset: 0;
}
.chart-plot svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: visible;
}
.chart-area {
    fill: color-mix(in oklch, var(--accent) 10%, transparent);
}
.chart-line {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2;
    stroke-linejoin: round;
    stroke-linecap: round;
    vector-effect: non-scaling-stroke;
}
.now-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 0;
    border-left: 1.5px dashed var(--fg);
    opacity: 0.35;
}
.dot {
    position: absolute;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    transform: translate(-50%, 50%);
    background: var(--level);
    outline-offset: 1px;
}
.dot:hover {
    transform: translate(-50%, 50%) scale(1.4);
}
.dot.now {
    outline: 2px solid var(--fg);
}
.hour-labels {
    display: flex;
    gap: 3px;
    margin-top: 6px;
}
.hour-labels span {
    flex: 1;
    text-align: center;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--muted);
}
.hour-labels span.now {
    color: var(--fg);
}
.legend {
    display: flex;
    gap: 20px;
    margin-top: 18px;
    font-size: 12px;
    color: var(--muted);
}
.legend span {
    display: flex;
    align-items: center;
    gap: 6px;
}
.legend span::before {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 3px;
    background: var(--level);
}
.legend .now-legend {
    margin-left: auto;
}
.legend .now-legend::before {
    content: none;
}

.table {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 40px;
}
.table-column {
    display: flex;
    flex-direction: column;
}
.table-head,
.table-row {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    border-bottom: 1px solid var(--line);
}
.table-head {
    padding: 6px 10px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}
.table-row {
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 13px;
}
.table-row.now {
    background: color-mix(in oklch, var(--accent) 10%, transparent);
}
.table-row .hour {
    font-family: var(--mono);
    color: var(--muted);
}
.table-row .price {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--level);
}
.table-row .price::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--level);
}

.source {
    margin: 0;
    font-size: 12px;
    color: var(--muted);
}

@media (max-width: 640px) {
    body {
        padding: 20px 14px 48px;
    }
    .header h1 {
        font-size: 21px;
    }
    .controls > * {
        flex: 1 1 auto;
    }
    .view-selector {
        margin-left: 0;
        width: 100%;
    }
    .view-selector button {
        flex: 1;
    }
    .now-price {
        font-size: 30px;
    }
    .chart {
        height: 180px;
    }
    .table {
        grid-template-columns: 1fr;
    }
    .table-column:last-child .table-head {
        display: none;
    }
}