:root {
    --color-bg-primary: #fcfcf9;
    --color-bg-secondary: #fffffe;
    --color-text-primary: #13343b;
    --color-text-secondary: #626c7c;
    --color-border: rgba(94, 82, 64, 0.2);
    --color-primary: #21808d;
    --color-primary-hover: #1d7480;
    --color-surface: #f5f5f5;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-primary: #1f2121;
        --color-bg-secondary: #262828;
        --color-text-primary: #f5f5f5;
        --color-text-secondary: #a7a9a9;
        --color-border: rgba(119, 124, 124, 0.3);
        --color-primary: #32b8c6;
        --color-primary-hover: #2da6b2;
        --color-surface: #1e293b;
    }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
}

#root {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

h2 {
    font-size: 1.25rem;
    margin: 1.5rem 0 0.75rem;
    color: var(--color-text-primary);
}

.subtitle {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.layout {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.usage-section {
    background: var(--color-bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.usage-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(420px, 100%), 1fr));
    gap: 0.25rem 2rem;
    margin-top: 0.75rem;
}

.usage-item {
    display: flex;
    flex-direction: column;
}

.usage-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
}

.usage-label {
    width: 9rem;
    flex-shrink: 0;
    margin: 0;
    font-weight: 400;
    cursor: pointer;
    font-size: 0.9rem;
}

input[type="number"].usage-magnitude {
    flex: 1;
    min-width: 0;
    padding: 0.2rem 0.4rem;
}

.usage-unit {
    color: var(--color-text-secondary);
    font-size: 0.82rem;
    white-space: nowrap;
    width: 3.5rem;
    flex-shrink: 0;
}

.usage-details-btn {
    padding: 0.1rem 0.35rem;
    font-size: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg-primary);
    color: var(--color-text-secondary);
    cursor: pointer;
    line-height: 1;
}

.controls {
    background: var(--color-bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    margin-bottom: 1rem;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
    font-size: 0.9rem;
}

input[type="range"] {
    width: 100%;
    margin: 0.5rem 0;
}

input[type="number"] {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-size: 0.9rem;
}

.value-display {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox-group label {
    margin: 0;
    cursor: pointer;
}

.main-content {
    background: var(--color-bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.heatmap-container {
    margin-bottom: 2rem;
}

.summary-line {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.3rem 0.6rem;
    margin: 0.75rem 0;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.summary-line-heading {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-right: 0.4rem;
}

.summary-line-value {
    font-weight: 600;
    color: var(--color-primary);
}

.summary-line-sep {
    color: var(--color-border);
    user-select: none;
}

.summary-line-stat {
    white-space: nowrap;
}

.divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 1.5rem 0;
}

@media (max-width: 767px) {
    /* Reduce page-level padding to use full screen width */
    #root {
        padding: 0.75rem;
    }

    h1 {
        font-size: 1.4rem;
    }

    h2 {
        font-size: 1rem;
        margin: 0.75rem 0 0.4rem;
    }

    .subtitle {
        margin-bottom: 1rem;
        font-size: 0.85rem;
    }

    /* Remove card chrome from section wrappers */
    .usage-section,
    .main-content {
        background: transparent;
        border: none;
        padding: 0;
        border-radius: 0;
    }

    .layout {
        gap: 0.75rem;
    }

    /* Tighten vertical spacing on controls */
    .controls {
        background: transparent;
        border: none;
        padding: 0;
        margin-bottom: 0.25rem;
    }

    .controls-grid {
        gap: 0.4rem;
    }

    .control-group {
        margin-bottom: 0;
    }

    /* Cap heatmap height */
    .heatmap-container {
        max-height: 30vh;
        overflow: hidden;
    }
}

/* Hourly breakdown legend */
.hourly-legend {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 0.5rem 0.5rem 0.5rem 60px; /* align with plot left margin */
    font-size: 0.82rem;
    color: var(--color-text-primary);
}

.legend-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.6rem 1rem;
}

.legend-group-label {
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    white-space: nowrap;
}

.legend-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-line-icon {
    color: #333;
    font-size: 0.75rem;
    margin-right: 0.1rem;
}

/* Hourly breakdown tooltip */
.hourly-tooltip {
    position: absolute;
    z-index: 100;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.75rem;
    font-size: 0.82rem;
    min-width: 200px;
    max-width: 280px;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.tt-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.4rem;
}

.tt-hour {
    font-weight: 600;
    color: var(--color-text-primary);
}

.tt-net {
    font-weight: 600;
    font-size: 0.78rem;
}

.tt-section {
    margin-top: 0.4rem;
}

.tt-section-title {
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.2rem;
}

.tt-row {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.1rem 0;
    color: var(--color-text-primary);
}

.tt-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.tt-pct {
    color: var(--color-text-secondary);
    margin-left: auto;
}

.tt-muted {
    color: var(--color-text-secondary);
    font-style: italic;
}