/* Sandbox & projects overview  -  inverted surfaces: light theme = dark UI, dark theme = light UI */
.page-sandbox,
.page-projects {
    --sandbox-nav-h: 72px;
    --sandbox-on-primary: #1a1a1a;
}

/* Hero secondary (loads after styles.css  -  ensure theme contrast on project-page-hero) */
body[data-theme="light"] .page-sandbox .project-page-hero .project-page-actions .btn.btn-secondary,
body[data-theme="light"] .page-projects .project-page-hero .project-page-actions .btn.btn-secondary {
    color: #0f172a;
    border-color: rgba(15, 23, 42, 0.35);
    background: transparent;
}

body[data-theme="light"] .page-sandbox .project-page-hero .project-page-actions .btn.btn-secondary:hover,
body[data-theme="light"] .page-projects .project-page-hero .project-page-actions .btn.btn-secondary:hover {
    background: #0f172a;
    color: #f8fafc;
    border-color: #0f172a;
}

body[data-theme="dark"] .page-sandbox .project-page-hero .project-page-actions .btn.btn-secondary,
body[data-theme="dark"] .page-projects .project-page-hero .project-page-actions .btn.btn-secondary {
    color: #ffffff;
    border-color: #ffffff;
    background: transparent;
}

body[data-theme="dark"] .page-sandbox .project-page-hero .project-page-actions .btn.btn-secondary:hover,
body[data-theme="dark"] .page-projects .project-page-hero .project-page-actions .btn.btn-secondary:hover {
    background: #ffffff;
    color: #1a1a1a;
    border-color: #ffffff;
}

/* Primary actions */
.page-sandbox .btn-primary,
.page-projects .btn-primary {
    color: var(--sandbox-on-primary);
    background: var(--primary-color);
}

.page-sandbox .btn-primary:hover,
.page-projects .btn-primary:hover {
    color: var(--sandbox-on-primary);
    background: var(--primary-dark);
}

/*  -  -  Theme palettes (swapped)  -  -  */
body[data-theme="light"] .page-sandbox,
body[data-theme="light"] .page-projects {
    --sandbox-page-bg: #050505;
    --sandbox-card-bg: #0c0c0c;
    --sandbox-card-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    --sandbox-stage-bg: #121212;
    --sandbox-bar-bg: color-mix(in srgb, #050505 92%, transparent);
    --sandbox-heading: #f9fafb;
    --sandbox-text: #e4e4e7;
    --sandbox-muted: #a1a1aa;
    --sandbox-empty-bg: color-mix(in srgb, #121212 70%, transparent);
    --sw-bg: #0c0c0c;
    --sw-surface: #18181b;
    --sw-border: #52525b;
    --sw-border-strong: #71717a;
    --sw-text: #e4e4e7;
    --sw-muted: #a1a1aa;
    --sw-heading: #fafafa;
    --sw-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    --sw-code-bg: #0d0d12;
    --sw-code-text: #e4e4e7;
    --sw-btn-secondary-fg: #f4f4f5;
    --sw-btn-secondary-border: #a1a1aa;
    --sw-btn-secondary-hover-bg: #f4f4f5;
    --sw-btn-secondary-hover-fg: #18181b;
}

body[data-theme="dark"] .page-sandbox,
body[data-theme="dark"] .page-projects {
    --sandbox-page-bg: #ffffff;
    --sandbox-card-bg: #ffffff;
    --sandbox-card-shadow: var(--shadow);
    --sandbox-stage-bg: #f4f6ff;
    --sandbox-bar-bg: color-mix(in srgb, #ffffff 92%, transparent);
    --sandbox-heading: #0f172a;
    --sandbox-text: #1f2937;
    --sandbox-muted: #6b7280;
    --sandbox-empty-bg: #f4f6ff;
    --sw-bg: #ffffff;
    --sw-surface: #f8fafc;
    --sw-border: #94a3b8;
    --sw-border-strong: #64748b;
    --sw-text: #1f2937;
    --sw-muted: #6b7280;
    --sw-heading: #0f172a;
    --sw-shadow: var(--shadow);
    --sw-code-bg: color-mix(in srgb, #f4f6ff 92%, #1f2937 8%);
    --sw-code-text: #1f2937;
    --sw-btn-secondary-fg: #0f172a;
    --sw-btn-secondary-border: #475569;
    --sw-btn-secondary-hover-bg: #0f172a;
    --sw-btn-secondary-hover-fg: #f8fafc;
}

/*  -  -  Overview (hero uses .project-page-hero from styles.css)  -  -  */
.page-sandbox .sandbox-overview-page,
.page-projects .sandbox-overview-page {
    padding-top: 0;
}

/*  -  -  Overview main  -  -  */
.page-sandbox .sandbox-page,
.page-projects .sandbox-page {
    padding: 2.5rem 0 4rem;
    background: var(--sandbox-page-bg);
}

.page-sandbox .sandbox-page__header,
.page-projects .sandbox-page__header {
    margin-bottom: 2rem;
}

.page-sandbox .sandbox-filters {
    margin-bottom: 2.25rem;
    padding: 1.35rem 1.5rem;
    background: var(--sandbox-card-bg);
    border: 1px solid var(--sw-border, var(--border-color));
    border-radius: 16px;
    box-shadow: var(--sandbox-card-shadow, var(--shadow));
}

.page-sandbox .sandbox-filters__search {
    margin-bottom: 1.25rem;
}

.page-sandbox .sandbox-filters__search-label,
.page-sandbox .sandbox-filters__group-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--sandbox-muted);
}

.page-sandbox .sandbox-filters__search-input {
    width: 100%;
    padding: 0.7rem 0.95rem;
    font-size: 1rem;
    color: var(--sandbox-heading);
    background: var(--sw-surface, var(--bg-light));
    border: 1px solid var(--sw-border-strong, var(--sw-border, var(--border-color)));
    border-radius: 10px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-sandbox .sandbox-filters__search-input::placeholder {
    color: color-mix(in srgb, var(--sandbox-muted) 80%, transparent);
}

.page-sandbox .sandbox-filters__search-input:focus {
    outline: none;
    border-color: color-mix(in srgb, var(--primary-color) 55%, var(--sw-border, var(--border-color)));
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 18%, transparent);
}

.page-sandbox .sandbox-filters__group + .sandbox-filters__group {
    margin-top: 1rem;
}

.page-sandbox .sandbox-filters__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.page-sandbox .sandbox-filter-chip {
    margin: 0;
    padding: 0.35rem 0.75rem;
    font: inherit;
    font-size: 0.82rem;
    font-weight: 500;
    line-height: 1.35;
    color: var(--sandbox-text);
    background: color-mix(in srgb, var(--sw-surface, var(--bg-light)) 92%, var(--primary-color) 8%);
    border: 1px solid var(--sw-border, var(--border-color));
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.page-sandbox .sandbox-filter-chip:hover {
    border-color: color-mix(in srgb, var(--primary-color) 45%, var(--sw-border, var(--border-color)));
}

.page-sandbox .sandbox-filter-chip.is-active {
    color: var(--sandbox-on-primary);
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.page-sandbox .sandbox-filters__footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1rem;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid color-mix(in srgb, var(--sw-border, var(--border-color)) 65%, transparent);
}

.page-sandbox .sandbox-filters__count {
    margin: 0;
    font-size: 0.9rem;
    color: var(--sandbox-muted);
}

.page-sandbox .sandbox-filters__clear {
    padding: 0.45rem 0.9rem;
    font-size: 0.85rem;
}

.page-sandbox .sandbox-filter-empty {
    margin: 0 0 2rem;
    padding: 2rem 1.5rem;
    text-align: center;
    border: 1px dashed var(--sw-border, var(--border-color));
    border-radius: 16px;
    color: var(--sandbox-muted);
    background: var(--sandbox-empty-bg);
}

.page-sandbox .sandbox-filter-empty[hidden],
.page-sandbox .sandbox-category[hidden],
.page-sandbox .sandbox-card[hidden] {
    display: none !important;
}

.page-sandbox .sandbox-page__heading,
.page-projects .sandbox-page__heading {
    margin: 0 0 0.35rem;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--sandbox-heading);
}

.page-sandbox .sandbox-page__sub,
.page-projects .sandbox-page__sub {
    margin: 0;
    font-size: 1rem;
    color: var(--sandbox-muted);
    max-width: 40rem;
}

.page-sandbox .sandbox-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    margin: 1.25rem 0 0;
    padding: 0;
    list-style: none;
}

.page-sandbox .sandbox-legend__item {
    margin: 0;
}

.page-sandbox .sandbox-legend__badge {
    margin-bottom: 0;
    cursor: default;
}

.page-sandbox .sandbox-category {
    margin-top: 2rem;
}

.page-sandbox .sandbox-category + .sandbox-category {
    margin-top: 2.75rem;
}

.page-sandbox .sandbox-category__header {
    margin-bottom: 1.25rem;
}

.page-sandbox .sandbox-category__title {
    margin: 0 0 0.35rem;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--sandbox-heading);
}

.page-sandbox .sandbox-category__sub {
    margin: 0;
    max-width: 42rem;
    font-size: 0.95rem;
    line-height: 1.55;
    color: var(--sandbox-muted);
}

.page-sandbox .sandbox-grid,
.page-projects .sandbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.page-sandbox .sandbox-card,
.page-projects .sandbox-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    margin: 0;
    padding: 0;
    background: var(--sandbox-card-bg);
    border: 1px solid var(--sw-border, var(--border-color));
    border-radius: 16px;
    box-shadow: var(--sandbox-card-shadow, var(--shadow));
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-sandbox .sandbox-card:hover,
.page-projects .sandbox-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: color-mix(in srgb, var(--primary-color) 40%, var(--sw-border, var(--border-color)));
}

.page-sandbox .sandbox-card__body,
.page-projects .sandbox-card__body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 1.5rem 1.5rem 1.25rem;
}

.page-sandbox .sandbox-card__thumb {
    border-bottom: 1px solid var(--sw-border, var(--border-color));
    background: color-mix(in srgb, var(--sandbox-card-bg) 88%, #000 12%);
}

.page-sandbox .sandbox-card__thumb img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 160px;
    object-fit: cover;
    object-position: top center;
}

.page-sandbox .sandbox-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.85rem;
}

.page-sandbox .sandbox-card__badge,
.page-projects .sandbox-card__badge {
    display: inline-block;
    width: fit-content;
    margin-bottom: 0;
    padding: 0.2rem 0.55rem;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: none;
    color: var(--primary-color);
    background: color-mix(in srgb, var(--primary-color) 14%, transparent);
    border-radius: 6px;
}

.page-sandbox .sandbox-card__badge--maturity-utility {
    color: #15803d;
    background: color-mix(in srgb, #22c55e 18%, transparent);
    border: 1px solid color-mix(in srgb, #22c55e 35%, transparent);
}

.page-sandbox .sandbox-card__badge--maturity-prototype {
    color: #a16207;
    background: color-mix(in srgb, #eab308 18%, transparent);
    border: 1px solid color-mix(in srgb, #eab308 35%, transparent);
}

.page-sandbox .sandbox-card__badge--maturity-component {
    color: #1d4ed8;
    background: color-mix(in srgb, #3b82f6 18%, transparent);
    border: 1px solid color-mix(in srgb, #3b82f6 35%, transparent);
}

.page-sandbox .sandbox-card__badge--maturity-experimental {
    color: #7e22ce;
    background: color-mix(in srgb, #a855f7 18%, transparent);
    border: 1px solid color-mix(in srgb, #a855f7 35%, transparent);
}

.page-sandbox .sandbox-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
}

.page-sandbox .sandbox-card__tech-chip {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--sandbox-text);
    background: color-mix(in srgb, var(--sw-surface, var(--bg-light)) 92%, var(--primary-color) 8%);
    border: 1px solid color-mix(in srgb, var(--sw-border, var(--border-color)) 85%, transparent);
    border-radius: 999px;
}

.page-sandbox .sandbox-card__title,
.page-projects .sandbox-card__title {
    margin: 0 0 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--sandbox-heading);
    line-height: 1.3;
}

.page-sandbox .sandbox-card__desc,
.page-projects .sandbox-card__desc {
    flex: 1;
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--sandbox-muted);
}

.page-sandbox .sandbox-card__footer,
.page-projects .sandbox-card__footer {
    padding: 0 1.5rem 1.5rem;
    margin-top: auto;
}

.page-sandbox .sandbox-card__cta.btn,
.page-projects .sandbox-card__cta.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
    text-align: center;
}

.page-sandbox .sandbox-card__cta.btn-primary,
.page-projects .sandbox-card__cta.btn-primary {
    border-color: transparent;
}

.page-projects .sandbox-page__header--archive {
    margin-top: 3.5rem;
    padding-top: 2.5rem;
    border-top: 1px solid color-mix(in srgb, var(--sandbox-muted) 35%, transparent);
}

.page-projects .sandbox-card--archived {
    border-style: dashed;
    opacity: 0.92;
}

.page-projects .sandbox-card--archived .sandbox-card__badge {
    background: color-mix(in srgb, var(--sandbox-muted) 22%, transparent);
    color: var(--sandbox-muted);
}

.page-projects .sandbox-card--archived:hover {
    opacity: 1;
}

.page-sandbox .sandbox-empty,
.page-projects .sandbox-empty {
    margin: 0;
    padding: 2.5rem 1.5rem;
    text-align: center;
    border: 1px dashed var(--sw-border, var(--border-color));
    border-radius: 16px;
    color: var(--sandbox-muted);
    background: var(--sandbox-empty-bg);
}

/*  -  -  Tool runner (hero uses .project-page-hero from styles.css)  -  -  */
.page-sandbox-tool .sandbox-tool-page {
    padding-top: 0;
}

.page-sandbox-tool .sandbox-tool-stage {
    padding: 0 0 4rem;
    min-height: min(50vh, 480px);
    background: var(--sandbox-stage-bg);
}

.page-sandbox-tool .sandbox-tool-stage > .container {
    max-width: 1200px;
}

/* Sandbox widgets must not inherit homepage section spacing */
.page-sandbox .sandbox-widget section {
    padding: 0;
    scroll-margin-top: 0;
}

/* Shared sandbox tool panel */
.sandbox-widget {
    --sw-radius: 12px;

    width: 100%;
    max-width: 100%;
    background: var(--sw-bg);
    color: var(--sw-text);
    border: 1px solid var(--sw-border-strong, var(--sw-border));
    border-radius: var(--sw-radius);
    box-shadow: var(--sw-shadow);
}

/* Tool stage: visible .btn and form controls (override global --bg-white on .btn-secondary) */
.page-sandbox .sandbox-widget .btn-secondary {
    color: var(--sw-btn-secondary-fg, var(--sw-text));
    border-color: var(--sw-btn-secondary-border, var(--sw-border-strong, var(--sw-border)));
    background: transparent;
}

.page-sandbox .sandbox-widget .btn-secondary:hover {
    background: var(--sw-btn-secondary-hover-bg, var(--sw-text));
    color: var(--sw-btn-secondary-hover-fg, var(--sw-bg));
    border-color: var(--sw-btn-secondary-hover-bg, var(--sw-btn-secondary-border));
}

.page-sandbox .sandbox-widget .btn-primary {
    border-color: transparent;
}

.page-sandbox .sandbox-widget input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="file"]),
.page-sandbox .sandbox-widget select,
.page-sandbox .sandbox-widget textarea {
    border: 1px solid var(--sw-border-strong, var(--sw-border));
}

.page-sandbox .sandbox-widget input[type="checkbox"],
.page-sandbox .sandbox-widget input[type="radio"] {
    outline: 1px solid var(--sw-border-strong, var(--sw-border));
    outline-offset: 1px;
}

.page-sandbox .sandbox-widget fieldset {
    border: 1px solid var(--sw-border-strong, var(--sw-border));
    border-radius: 8px;
    padding: 0.75rem 1rem 1rem;
}

.page-sandbox .visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 768px) {
    .page-sandbox .sandbox-page,
.page-projects .sandbox-page {
        padding: 2rem 0 3rem;
    }

    .page-sandbox .sandbox-grid,
.page-projects .sandbox-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .page-sandbox-tool .sandbox-tool-stage {
        padding: 0 0 3rem;
    }
}