/* Hydrogen types reference page */

.hydrogen-intro {
    margin-bottom: 16px;
    padding: 16px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.hydrogen-intro-copy {
    max-width: 980px;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.6;
}

.hydrogen-intro-copy strong {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 16px;
}

.hydrogen-intro-copy p {
    margin: 0 0 6px;
}

.hydrogen-intro-copy p:last-child {
    margin-bottom: 0;
}

.hydrogen-summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.hydrogen-summary-item {
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.hydrogen-summary-item .summary-label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
}

.hydrogen-summary-item strong {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 700;
}

.hydrogen-key-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.hydrogen-key-panel {
    min-height: 130px;
    padding: 15px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.hydrogen-key-panel .key-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    margin-bottom: 10px;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.14);
    color: var(--accent-primary, #3b82f6);
    font-size: 12px;
    font-weight: 800;
}

.hydrogen-key-panel strong {
    display: block;
    margin-bottom: 7px;
    color: var(--text-primary);
    font-size: 14px;
}

.hydrogen-key-panel p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}

.hydrogen-palette-section,
.hydrogen-checkpoints {
    margin-bottom: 18px;
}

.section-heading-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
}

.section-heading-row h2 {
    margin: 0 0 4px;
    color: var(--text-primary);
    font-size: 17px;
}

.section-heading-row p {
    margin: 0;
    color: var(--text-muted);
    font-size: 13px;
}

.hydrogen-palette {
    display: grid;
    grid-template-columns: repeat(4, minmax(170px, 1fr));
    gap: 10px;
}

.hydrogen-chip {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 10px;
    align-items: center;
    min-height: 66px;
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.hydrogen-swatch {
    display: inline-block;
    flex: 0 0 auto;
    width: 14px;
    height: 14px;
    border: 1px solid rgba(15, 23, 42, 0.25);
    border-radius: 999px;
    background: var(--swatch);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.hydrogen-chip strong {
    display: block;
    margin-bottom: 3px;
    color: var(--text-primary);
    font-size: 13px;
}

.hydrogen-chip span:not(.hydrogen-swatch) {
    color: var(--text-muted);
    font-size: 12px;
}

.hydrogen-chip em,
.definition-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 3px 7px;
    border-radius: 999px;
    background: rgba(245, 158, 11, 0.13);
    color: #b45309;
    font-size: 11px;
    font-style: normal;
    font-weight: 800;
    white-space: nowrap;
}

.hydrogen-table th {
    position: sticky;
    top: 0;
    z-index: 2;
}

.hydrogen-table .col-type,
.hydrogen-table .col-meaning,
.hydrogen-table .col-route,
.hydrogen-table .col-carbon,
.hydrogen-table .col-maturity,
.hydrogen-table .col-caution {
    vertical-align: top;
}

.hydrogen-table .col-type {
    min-width: 180px;
}

.hydrogen-table .col-meaning {
    min-width: 210px;
}

.hydrogen-table .col-route,
.hydrogen-table .col-carbon,
.hydrogen-table .col-maturity,
.hydrogen-table .col-caution {
    min-width: 240px;
}

.hydrogen-type-name {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 5px;
}

.hydrogen-type-name strong {
    color: var(--text-primary);
}

.hydrogen-table td {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}

.hydrogen-table td strong {
    display: block;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.hydrogen-table td span {
    display: block;
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 12px;
}

.hydrogen-table .definition-badge {
    display: inline-flex;
    margin: 0 0 7px;
    color: #b45309;
}

.hydrogen-checkpoint-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(160px, 1fr));
    gap: 12px;
}

.hydrogen-checkpoint-grid div {
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.hydrogen-checkpoint-grid strong {
    display: block;
    margin-bottom: 7px;
    color: var(--text-primary);
    font-size: 13px;
}

.hydrogen-checkpoint-grid span {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}

.hydrogen-note {
    margin-top: 16px;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 12px;
    line-height: 1.6;
}

.hydrogen-note p {
    margin: 0 0 6px;
}

.hydrogen-source-list {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 10px;
}

.hydrogen-source-list a {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    border-radius: 6px;
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent-primary, #3b82f6);
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
}

.hydrogen-source-list a:hover {
    text-decoration: underline;
}

@media (max-width: 1180px) {
    .hydrogen-palette {
        grid-template-columns: repeat(3, minmax(170px, 1fr));
    }

    .hydrogen-checkpoint-grid {
        grid-template-columns: repeat(2, minmax(180px, 1fr));
    }
}

@media (max-width: 900px) {
    .hydrogen-summary-grid,
    .hydrogen-key-grid {
        grid-template-columns: repeat(2, minmax(140px, 1fr));
    }
}

@media (max-width: 640px) {
    .hydrogen-summary-grid,
    .hydrogen-key-grid,
    .hydrogen-palette,
    .hydrogen-checkpoint-grid {
        grid-template-columns: 1fr;
    }
}