/* Internal pages: demos list, models list, detail */
.internal-header {
    position: relative;
    background: rgba(10, 11, 15, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--border);
    padding: 0.75rem 0;
}

.internal-header .header-inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
}

.internal-header .header-actions {
    justify-self: end;
}

.internal-nav {
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
    justify-content: center;
}

.internal-nav a.active {
    color: var(--accent-light);
}

.internal-main {
    padding: 6rem 0 4rem;
    min-height: 60vh;
}

.internal-container {
    max-width: 960px;
}

.internal-breadcrumb {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-family: var(--font-body);
}

.internal-breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
}

.internal-breadcrumb a:hover {
    color: var(--accent-light);
}

.bc-sep {
    opacity: 0.5;
    margin: 0 0.35rem;
}

.internal-top {
    margin-bottom: 0.25rem;
}

.internal-page-head {
    margin-bottom: 2.5rem;
}

/* h2 between page intro and card grid (outline: h1 → h2 → h3 per card) */
.internal-list-subheading {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    margin: -1rem 0 1.25rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.internal-aside.internal-related {
    margin-bottom: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.internal-aside.internal-related h2 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text);
}

.internal-page-head h1 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    line-height: 1.25;
}

.internal-lead {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 42rem;
    line-height: 1.7;
}

.internal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
}

/* Semantic list wrapper: grid applies to cards inside <li> via display:contents */
ul.internal-grid {
    list-style: none;
    margin: 0;
    padding: 0;
}

.internal-grid > li {
    display: contents;
}

/* Breadcrumb: ordered list, visually inline */
.bc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0;
    font-size: inherit;
    font-family: inherit;
}

.bc-list > li {
    display: inline-flex;
    align-items: center;
}

.bc-list > li:not(:last-child)::after {
    content: "/";
    opacity: 0.5;
    margin: 0 0.35rem;
}

.internal-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: right;
    padding: 1.35rem 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.internal-card:hover {
    border-color: rgba(99, 102, 241, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.internal-card-emoji {
    font-size: 1.75rem;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.internal-card-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.35;
    direction: ltr;
    text-align: left;
    unicode-bidi: isolate;
    align-self: stretch;
    width: 100%;
}

.internal-card-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.55;
    flex: 1;
    margin-bottom: 0.75rem;
}

.internal-card-meta {
    font-size: 0.75rem;
    color: var(--accent-light);
    font-weight: 600;
}

.internal-article {
    max-width: 720px;
}

.internal-hero-detail {
    margin-bottom: 2.5rem;
}

.internal-hero-detail h1 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 800;
    margin: 0.75rem 0 1rem;
    line-height: 1.3;
}

.internal-hero-emoji {
    font-size: 2.5rem;
    line-height: 1;
    display: block;
}

.internal-hero-emoji i {
    color: var(--accent-light);
}

.internal-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.internal-section {
    margin-bottom: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.internal-section h2 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text);
}

.internal-dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

.internal-dl dt {
    color: var(--text-muted);
    font-weight: 600;
}

.internal-dl dd {
    margin: 0;
    word-break: break-word;
}

.internal-dl code {
    font-size: 0.85em;
    background: var(--surface-2);
    padding: 0.15rem 0.45rem;
    border-radius: 6px;
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.chip {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--surface-2);
    border-radius: 999px;
    font-size: 0.75rem;
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.internal-footer {
    margin-top: 3rem;
    padding-top: 2rem;
}

.internal-footer .footer-inner {
    flex-wrap: wrap;
    gap: 1rem;
}

.internal-footer .footer-links a {
    margin-inline-end: 1rem;
}

@media (max-width: 900px) {
    .internal-header .header-inner {
        display: grid;
        grid-template-columns: 1fr auto;
        gap: 1rem;
    }

    .internal-nav {
        grid-column: 1 / -1;
        justify-content: flex-start;
        order: 3;
    }
}