:root {
    --ink: #222;
    --muted: #666;
    --paper: #fafafa;
    --card: #fff;
    --accent: #ffab19;
    --line: #e5e5e5;
    --radius: 6px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Poppins", sans-serif;
}

.page {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
    padding: 56px 0 72px;
}

header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    padding-bottom: 42px;
}


.eyebrow {
    margin: 0 0 12px;
    color: var(--accent);
    font-family: "Poppins", sans-serif;
    font-size: 0.75rem;
    font-weight: bold;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 600;
    line-height: 1.2;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 22px;
    padding: 18px 0;
    margin-bottom: 52px;
    font-family: "Poppins", sans-serif;
    font-size: 0.85rem;
    border-top: 2px solid var(--line);
    border-bottom: 2px solid var(--line);
}

nav a {
    color: var(--ink);
    text-decoration: none;
}

nav a:hover,
nav a:focus-visible { color: var(--accent); }

.project-page.has-content-navigation {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    column-gap: 56px;
}

.project-page.has-content-navigation > header,
.project-page.has-content-navigation > nav,
.project-page.has-content-navigation > .content {
    grid-column: 1;
}

.project-page.has-content-navigation > header { grid-row: 1; }
.project-page.has-content-navigation > nav { grid-row: 2; }
.project-page.has-content-navigation > .content { grid-row: 3; }

.content-navigation {
    position: sticky;
    top: 32px;
    align-self: start;
    display: flex;
    grid-column: 2;
    grid-row: 1 / span 3;
    flex-direction: column;
    gap: 0;
    margin-top: 150px;
    padding: 18px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.content-navigation[hidden] { display: none; }

.content-navigation-label {
    margin: 0 0 14px;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.content-navigation a {
    padding: 9px 0;
    color: var(--ink);
    border-bottom: 1px solid var(--line);
    font-size: 0.8rem;
    line-height: 1.35;
    text-decoration: none;
}

.content-navigation a:hover,
.content-navigation a:focus-visible { color: var(--accent); }

.content-navigation a.is-active {
    color: var(--accent);
    font-weight: 600;
}

.content-navigation a:last-child { border-bottom: 0; }

.content-navigation-subitem { padding-left: 12px !important; }

.section-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 20px;
}

h2 { margin: 0; font-size: 1.7rem; font-weight: 500; }

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.content {
    max-width: 780px;
    font-size: 1rem;
    line-height: 1.8;
}

.content p {
    margin: 0 0 1.25rem;
}

.content ul {
    margin: 0 0 1.5rem;
    padding-left: 1.25rem;
}

.content li { margin-bottom: 0.65rem; }

.content a {
    color: var(--ink);
    text-decoration-color: var(--accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

.content a:hover,
.content a:focus-visible { color: var(--accent); }

.content img {
    display: block;
    width: min(100%, 560px);
    height: auto;
    margin: 1.75rem 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.content .wide-image { width: min(100%, 780px); }

.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 18px;
    margin: 1.75rem 0;
}

.image-gallery figure {
    min-width: 0;
    margin: 0;
}

.image-gallery img {
    width: 100%;
    margin: 0;
    height: auto;
    object-fit: contain;
}

.image-gallery figcaption {
    margin-top: 8px;
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.4;
}

.content .step {
    margin-top: 1.75rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
    font-weight: 600;
}

.markdown-block {
    margin-bottom: 26px;
}

.markdown-block p,
.markdown-block ul,
.markdown-block h1,
.markdown-block h2,
.markdown-block h3 {
    margin-top: 0;
}

.markdown-block code {
    padding: 0.1em 0.3em;
    background: var(--line);
    border-radius: var(--radius);
    font-size: 0.9em;
}

.project-card {
    display: flex;
    min-width: 0;
    flex-direction: column;
    overflow: hidden;
    color: var(--ink);
    background: var(--card);
    border: 1px solid var(--line);
    text-decoration: none;
    transition: border-color 160ms ease, transform 160ms ease;
    border-radius: var(--radius);
}

.project-card:hover,
.project-card:focus-visible {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.project-card img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border-bottom: 1px solid var(--line);
}

.preview-title-block {
    margin-bottom: 26px;
}

.card-content {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 20px;
    padding: 22px;
}

.card-week {
    flex: 0 0 auto;
    color: var(--accent);
    font-family: "Poppins", sans-serif;
    font-size: 0.75rem;
    font-weight: bold;
}

.card-title {
    margin: 0;
    font-size: clamp(1rem, 1.8vw, 1.4rem);
    font-weight: 500;
    line-height: 1.05;
}

.status-message {
    color: var(--muted);
    font-family: "Poppins", sans-serif;
}

.video-block {
    margin: 2rem 0;
}

.video-block video {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.video-block figcaption {
    margin-top: 8px;
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.4;
}

.video-block iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 0;
    border-radius: var(--radius);
}

.code-block {
    margin: 2rem 0;
}

.code-block pre {
    max-width: 100%;
    margin: 0;
    padding: 16px;
    overflow-x: auto;
    color: var(--ink);
    background: var(--line);
    border-radius: var(--radius);
    font-family: monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-wrap;
    tab-size: 4;
}

.files-block {
    margin: 2rem 0;
}

.files-block ul {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.files-block a {
    display: inline-block;
    padding: 10px 14px;
    color: var(--ink);
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    text-decoration: none;
}

.files-block a::before {
    content: 'Download';
    margin-right: 0.3em;
    color: var(--muted);
}

.files-block a:hover,
.files-block a:focus-visible {
    border-color: var(--accent);
}

.glb-block {
    margin: 2rem 0;
}

.glb-block model-viewer {
    display: block;
    width: 100%;
    height: min(60vw, 520px);
    min-height: 280px;
    background: var(--line);
    border-radius: var(--radius);
}


@media (max-width: 700px) {
    .page {
        width: min(100% - 28px, 560px);
        padding-top: 32px;
    }

    header {
        display: block;
        padding-bottom: 28px;
    }

    .intro {
        max-width: 100%;
        margin-top: 24px;
    }

    nav { padding-bottom: 36px; }

    .project-grid { grid-template-columns: 1fr; }

    .project-page.has-content-navigation { display: block; }

    .content-navigation {
        display: none;
    }
}