:root {
    color-scheme: dark;
    --bg-base: #06070a;
    --bg-surface: #10121a;
    --bg-card: #161925;
    --accent: #CCFF00;
    --text-main: #f1f5f9;
    --text-muted: #8b949e;
    --border: #272b3c;
    --border-light: #3a4055;
    --nav-bg: rgba(6, 7, 10, 0.82);
    --grid-opacity: 0.2;
    --scanline-opacity: 0.7;
    --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Microsoft YaHei', 'PingFang SC', sans-serif;
    --font-mono: 'JetBrains Mono', 'Microsoft YaHei', monospace;
    --skew-angle: -6deg;
    --clip-chamfer: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
}

:root[data-theme="light"] {
    color-scheme: light;
    --bg-base: #f5f7ee;
    --bg-surface: #ffffff;
    --bg-card: #eef2e8;
    --accent: #B6E000;
    --text-main: #151922;
    --text-muted: #5d6675;
    --border: #d5dcc9;
    --border-light: #aeb8a1;
    --nav-bg: rgba(245, 247, 238, 0.88);
    --grid-opacity: 0.62;
    --scanline-opacity: 0.16;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: var(--font-display);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: var(--grid-opacity);
    z-index: -3;
    pointer-events: none;
}

.scanlines {
    position: fixed;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.3) 51%);
    background-size: 100% 4px;
    opacity: var(--scanline-opacity);
    z-index: 8;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 2rem;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.15rem 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 800;
    text-transform: uppercase;
}

.logo-box {
    position: relative;
    width: 46px;
    height: 46px;
    flex: 0 0 46px;
    overflow: hidden;
}

.logo-box img {
    position: absolute;
    inset: 0;
    display: none;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

:root:not([data-theme="light"]) .logo-img-dark,
:root[data-theme="light"] .logo-img-light {
    display: block;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 800;
    text-transform: uppercase;
}

.nav-link,
.toggle-group {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    transform: skewX(var(--skew-angle));
}

.nav-link,
.toggle-btn {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0.38rem 0.72rem;
}

.nav-link span,
.toggle-btn span {
    display: inline-block;
    transform: skewX(calc(var(--skew-angle) * -1));
}

.toggle-group {
    display: flex;
}

.toggle-btn {
    border: 0;
    background: transparent;
    color: var(--text-muted);
    font: inherit;
    cursor: pointer;
}

.toggle-btn.active {
    background: var(--accent);
    color: var(--bg-base);
}

main {
    position: relative;
    padding-top: 7rem;
}

section {
    padding: 4.8rem 0;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.section-tag::before {
    content: "";
    width: 8px;
    height: 8px;
    background: var(--accent);
    transform: skewX(var(--skew-angle));
}

.hero-title {
    max-width: 1000px;
    margin-bottom: 1.5rem;
    font-size: clamp(3rem, 7vw, 6.5rem);
    font-style: italic;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -2px;
    text-transform: uppercase;
    transform: skewX(var(--skew-angle));
}

.hero-copy {
    max-width: 780px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: clamp(1rem, 2vw, 1.15rem);
}

.panel {
    position: relative;
    padding: 2.4rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    clip-path: var(--clip-chamfer);
}

.panel::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--accent);
}

.panel p {
    color: var(--text-muted);
    font-size: 1.08rem;
}

.panel strong {
    color: var(--text-main);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.detail-card {
    min-height: 210px;
    padding: 1.7rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.detail-card h2 {
    margin-bottom: 0.9rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.detail-card p,
.detail-card li {
    color: var(--text-muted);
    font-size: 1rem;
}

.detail-card ul {
    display: grid;
    gap: 0.55rem;
    padding-left: 1rem;
}

.project-insight-grid {
    max-width: 1320px;
    gap: 2rem;
    align-items: stretch;
}

.project-insight-intro {
    max-width: 1320px;
    margin-bottom: 1.7rem;
}

.project-insight-intro h2 {
    max-width: 900px;
    font-size: clamp(2.6rem, 5.2vw, 5rem);
    font-style: italic;
    font-weight: 800;
    line-height: 0.98;
    letter-spacing: -1px;
    text-transform: uppercase;
    transform: skewX(var(--skew-angle));
}

.project-insight-card {
    min-height: 390px;
    padding: clamp(2rem, 3vw, 2.7rem);
    display: flex;
    flex-direction: column;
    border-color: color-mix(in srgb, var(--accent) 26%, var(--border));
    background:
        linear-gradient(145deg, color-mix(in srgb, var(--accent) 5%, transparent), transparent 34%),
        var(--bg-surface);
}

.insight-index {
    width: fit-content;
    margin-bottom: 1.5rem;
    padding: 0.22rem 0.55rem;
    background: var(--accent);
    color: var(--bg-base);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 800;
    transform: skewX(var(--skew-angle));
}

.project-insight-card h2 {
    max-width: 13ch;
    margin-bottom: 1.15rem;
    font-size: clamp(1.05rem, 1.5vw, 1.35rem);
    line-height: 1.28;
}

.project-insight-card p {
    margin-bottom: 1.35rem;
    color: var(--text-main);
    font-size: clamp(1.08rem, 1.4vw, 1.22rem);
    line-height: 1.65;
}

.project-insight-card ul {
    gap: 0.9rem;
    margin-top: auto;
    padding-left: 1.1rem;
}

.project-insight-card li {
    font-size: clamp(1rem, 1.2vw, 1.08rem);
    line-height: 1.65;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1.2rem;
}

.tag {
    padding: 0.36rem 0.75rem;
    background: var(--bg-base);
    border: 1px solid var(--border);
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 1.6rem;
    background: var(--accent);
    color: var(--bg-base);
    border: 1px solid var(--accent);
    clip-path: var(--clip-chamfer);
    font-family: var(--font-mono);
    font-weight: 800;
    text-transform: uppercase;
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-main);
    border-color: var(--border-light);
}

/* Design portfolio showcase */
[data-reveal] {
    opacity: 0;
    transform: translateY(34px);
    transition:
        opacity 700ms cubic-bezier(0.16, 1, 0.3, 1),
        transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}

.portfolio-hero {
    min-height: calc(100vh - 7rem);
    display: flex;
    align-items: center;
    padding: 6rem 0 5rem;
}

.portfolio-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.86fr) minmax(360px, 1fr);
    align-items: center;
    gap: clamp(2rem, 5vw, 5rem);
}

.portfolio-hero-copy .hero-title {
    font-size: clamp(3.2rem, 6vw, 5.3rem);
}

.portfolio-hero-copy .hero-copy {
    max-width: 680px;
}

.hero-product-card {
    position: relative;
    z-index: 12;
    padding: clamp(0.75rem, 2vw, 1.2rem);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.08), transparent 34%),
        var(--bg-surface);
    border: 1px solid var(--border-light);
    clip-path: var(--clip-chamfer);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.42);
}

.hero-product-card::before,
.hero-product-card::after {
    content: "";
    position: absolute;
    pointer-events: none;
}

.hero-product-card::before {
    inset: 9%;
    border: 1px dashed var(--accent);
    opacity: 0.26;
    transform: translate(18px, -18px);
}

.hero-product-card::after {
    right: 1.2rem;
    bottom: 1.2rem;
    width: 62px;
    height: 62px;
    background: linear-gradient(135deg, transparent 50%, var(--accent) 50%);
    opacity: 0.92;
}

.product-screen {
    position: relative;
    z-index: 1;
    overflow: hidden;
    aspect-ratio: 1.414 / 1;
    background: #f7f7f3;
    border: 1px solid var(--border);
}

.product-screen img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-caption {
    margin-top: 1rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.portfolio-overview {
    padding: 0 0 4.8rem;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--border);
    clip-path: var(--clip-chamfer);
}

.overview-stat {
    min-height: 160px;
    padding: 2rem;
    background: var(--bg-surface);
}

.overview-stat strong {
    display: block;
    margin-bottom: 0.65rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1;
}

.overview-stat span {
    display: block;
    max-width: 260px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: uppercase;
}

.drawing-story {
    padding: 8rem 0;
}

.story-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
    gap: clamp(2rem, 5vw, 5rem);
    align-items: start;
}

.story-stage {
    position: sticky;
    top: 7.2rem;
    z-index: 12;
}

.stage-shell {
    position: relative;
    z-index: 1;
    overflow: hidden;
    aspect-ratio: 1.414 / 1;
    background: #f7f7f3;
    border: 1px solid var(--border-light);
    clip-path: var(--clip-chamfer);
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
}

.stage-shell::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(120deg, rgba(255, 255, 255, 0.22), transparent 28%),
        linear-gradient(to bottom, transparent 64%, rgba(0, 0, 0, 0.08));
    pointer-events: none;
}

.stage-shell img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition:
        opacity 220ms ease,
        transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}

.stage-shell img.is-swapping {
    opacity: 0;
    transform: scale(1.018);
}

#storyCaption {
    margin-top: 1rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.story-steps {
    display: grid;
    gap: 34vh;
    padding: 5vh 0 30vh;
}

.story-step {
    min-height: 52vh;
    padding: 2rem;
    background: color-mix(in srgb, var(--bg-surface) 82%, transparent);
    border: 1px solid var(--border);
    clip-path: var(--clip-chamfer);
    transition:
        border-color 240ms ease,
        background 240ms ease,
        transform 240ms ease;
}

.story-step.is-active {
    border-color: var(--accent);
    background: var(--bg-surface);
    transform: translateX(-10px);
}

.story-step span {
    display: inline-flex;
    margin-bottom: 1.1rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 800;
}

.story-step h2 {
    margin-bottom: 1rem;
    font-size: clamp(1.7rem, 3.6vw, 3rem);
    font-style: italic;
    font-weight: 800;
    line-height: 1.04;
    letter-spacing: -0.8px;
    text-transform: uppercase;
    transform: skewX(var(--skew-angle));
}

.story-step p {
    color: var(--text-muted);
    font-size: 1.06rem;
}

.sheet-gallery {
    padding-top: 3rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.4rem;
}

.sheet-card {
    position: relative;
    z-index: 12;
    overflow: hidden;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    clip-path: var(--clip-chamfer);
}

.sheet-card.wide {
    grid-column: span 2;
}

.sheet-card img {
    display: block;
    width: 100%;
    aspect-ratio: 1.414 / 1;
    object-fit: cover;
    background: #f7f7f3;
    transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.sheet-card:hover img {
    transform: scale(1.018);
}

.sheet-card figcaption {
    padding: 1rem 1.2rem 1.15rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

.source-section {
    padding-top: 7rem;
    scroll-margin-top: 6.8rem;
}

.model-showcase-wrap {
    max-width: 1420px;
}

.model-showcase {
    position: relative;
    z-index: 12;
    overflow: hidden;
    min-height: min(78vh, 820px);
    padding: clamp(0.9rem, 2vw, 1.4rem);
    background:
        radial-gradient(circle at 50% 42%, rgba(204, 255, 0, 0.18), transparent 33%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.07), transparent 34%),
        var(--bg-surface);
    border: 1px solid var(--border-light);
    clip-path: var(--clip-chamfer);
    box-shadow: 0 36px 90px rgba(0, 0, 0, 0.42);
}

.model-showcase::before {
    content: "";
    position: absolute;
    inset: 1.35rem;
    border: 1px dashed var(--accent);
    opacity: 0.18;
    pointer-events: none;
}

.model-showcase model-viewer {
    display: block;
    width: 100%;
    height: clamp(560px, 72vh, 780px);
    background:
        radial-gradient(circle at 50% 58%, rgba(204, 255, 0, 0.2), transparent 30%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 48%),
        var(--bg-base);
    border: 1px solid var(--border);
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
    --poster-color: var(--bg-base);
    touch-action: pan-y;
}

.model-showcase-copy {
    position: absolute;
    left: clamp(1.6rem, 4vw, 4rem);
    bottom: clamp(1.6rem, 4vw, 3.5rem);
    z-index: 1;
    max-width: 520px;
    padding: 1.25rem 1.35rem;
    background: color-mix(in srgb, var(--bg-base) 76%, transparent);
    border-left: 5px solid var(--accent);
    backdrop-filter: blur(10px);
}

.model-showcase-copy strong,
.source-file-card strong {
    display: block;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.model-showcase-copy p,
.source-file-card p {
    margin: 0.7rem 0 0.35rem;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: clamp(1rem, 1.3vw, 1.2rem);
    font-weight: 800;
}

.model-showcase-copy small,
.source-file-card small {
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.model-reset-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    margin-top: 1rem;
    padding: 0.48rem 0.95rem;
    background: color-mix(in srgb, var(--bg-surface) 88%, transparent);
    color: var(--text-main);
    border: 1px solid var(--border-light);
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition:
        background 180ms ease,
        border-color 180ms ease,
        color 180ms ease,
        transform 180ms ease;
}

.model-reset-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-base);
    transform: translateY(-1px);
}

.model-reset-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.source-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    gap: 1.5rem;
    align-items: stretch;
    margin-top: 2rem;
}

.source-copy,
.source-file-card {
    min-height: 260px;
}

.source-file-card {
    position: relative;
    overflow: hidden;
    padding: 2rem;
    background:
        radial-gradient(circle at 80% 20%, rgba(204, 255, 0, 0.15), transparent 32%),
        var(--bg-surface);
    border: 1px solid var(--border);
    clip-path: var(--clip-chamfer);
}

.source-file-card p {
    font-size: clamp(1.3rem, 2.5vw, 2.2rem);
    word-break: break-word;
}

.model-lines {
    position: absolute;
    inset: 18%;
    transform: skewX(-18deg) rotate(-12deg);
    opacity: 0.5;
}

.model-lines span {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    animation: modelLine 3.6s linear infinite;
}

.model-lines span:nth-child(1) { top: 10%; animation-delay: -0.2s; }
.model-lines span:nth-child(2) { top: 30%; animation-delay: -0.8s; }
.model-lines span:nth-child(3) { top: 50%; animation-delay: -1.4s; }
.model-lines span:nth-child(4) { top: 70%; animation-delay: -2s; }
.model-lines span:nth-child(5) { top: 90%; animation-delay: -2.6s; }

@keyframes modelLine {
    0% { transform: translateX(-35%); opacity: 0; }
    20% { opacity: 0.85; }
    80% { opacity: 0.85; }
    100% { transform: translateX(35%); opacity: 0; }
}

.robot-war-hero .hero-title {
    max-width: 960px;
}

.robot-photo-hero {
    transform: rotate(1.5deg);
}

.robot-photo-screen {
    aspect-ratio: 4 / 5;
}

.robot-photo-screen img {
    object-fit: cover;
}

.robot-model-section {
    padding-top: 6rem;
}

.robot-model-showcase {
    min-height: min(82vh, 860px);
}

.robot-model-showcase model-viewer {
    height: clamp(620px, 76vh, 820px);
}

.robot-story-section {
    padding-top: 7rem;
}

.robot-story-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    overflow: hidden;
    background: var(--border);
    border: 1px solid var(--border);
    clip-path: var(--clip-chamfer);
}

.robot-story-card {
    min-height: 360px;
    padding: clamp(1.5rem, 2.4vw, 2.2rem);
    background:
        linear-gradient(160deg, color-mix(in srgb, var(--accent) 6%, transparent), transparent 42%),
        var(--bg-surface);
}

.robot-story-card span {
    display: inline-flex;
    margin-bottom: 1.2rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 800;
}

.robot-story-card h2 {
    margin-bottom: 1rem;
    font-size: clamp(1.35rem, 2.3vw, 2.05rem);
    font-style: italic;
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.5px;
    text-transform: uppercase;
    transform: skewX(var(--skew-angle));
}

.robot-story-card p {
    color: var(--text-muted);
    font-size: 1rem;
}

.robot-moments-section {
    padding-top: 7rem;
}

.robot-moments-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1.2rem, 3vw, 2.2rem);
    align-items: stretch;
}

.robot-moment-card {
    position: relative;
    z-index: 12;
    overflow: hidden;
    margin: 0;
    min-height: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    clip-path: var(--clip-chamfer);
    box-shadow: 0 28px 78px rgba(0, 0, 0, 0.34);
}

.robot-moment-card::before,
.robot-moment-card::after {
    display: none;
}

.robot-moment-card img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    transition: transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}

.robot-moment-card:hover img {
    transform: scale(1.018);
}

.robot-moment-index {
    display: inline-flex;
    width: fit-content;
    margin: 0.95rem 0 0.75rem 1rem;
    padding: 0.25rem 0.58rem;
    background: var(--accent);
    color: var(--bg-base);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 800;
    transform: skewX(var(--skew-angle));
}

.robot-moment-card figcaption {
    padding: 1rem 1.15rem 1.15rem;
    background:
        linear-gradient(145deg, color-mix(in srgb, var(--accent) 5%, transparent), transparent 42%),
        var(--bg-surface);
    border-top: 3px solid var(--accent);
}

.robot-moment-card figcaption span {
    display: block;
    margin-bottom: 0.55rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.robot-moment-card figcaption strong {
    display: block;
    max-width: 62ch;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: clamp(0.9rem, 1.05vw, 1rem);
    line-height: 1.55;
}

@media (prefers-reduced-motion: reduce) {
    [data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .model-lines span,
    .stage-shell img {
        animation: none;
        transition: none;
    }
}

@media (max-width: 820px) {
    .container {
        padding: 0 1.1rem;
    }

    .nav-inner {
        gap: 0.75rem;
    }

    .logo {
        font-size: 1rem;
    }

    .logo-box {
        width: 36px;
        height: 36px;
        flex-basis: 36px;
    }

    .nav-actions {
        gap: 0.45rem;
        font-size: 0.7rem;
    }

    .nav-link,
    .toggle-btn {
        min-height: 30px;
        padding: 0.32rem 0.5rem;
    }

    main {
        padding-top: 5.6rem;
    }

    section {
        padding: 3.4rem 0;
    }

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

    .project-insight-card {
        min-height: auto;
    }

    .project-insight-card h2 {
        max-width: none;
    }

    .panel {
        padding: 2rem 1.4rem;
    }

    .btn {
        width: 100%;
    }

    .portfolio-hero {
        min-height: auto;
        padding: 3.4rem 0 3rem;
    }

    .portfolio-hero-grid,
    .story-layout,
    .source-grid,
    .overview-grid,
    .gallery-grid,
    .robot-story-grid,
    .robot-moments-layout {
        grid-template-columns: 1fr;
    }

    .portfolio-hero-copy .hero-title {
        font-size: clamp(2.35rem, 11vw, 3.45rem);
    }

    .hero-product-card,
    .story-step {
        transform: none;
    }

    .robot-photo-hero {
        transform: none;
    }

    .hero-product-card::before {
        display: none;
    }

    .portfolio-overview {
        padding-bottom: 2.4rem;
    }

    .overview-stat {
        min-height: 128px;
        padding: 1.45rem;
    }

    .drawing-story {
        padding: 3.6rem 0;
    }

    .story-stage {
        position: relative;
        top: auto;
        margin-bottom: 2rem;
    }

    .story-steps {
        gap: 1rem;
        padding: 0;
    }

    .story-step {
        min-height: auto;
        padding: 1.35rem;
    }

    .story-step.is-active {
        transform: none;
    }

    .sheet-card.wide {
        grid-column: auto;
    }

    .source-copy,
    .source-file-card {
        min-height: auto;
    }

    .source-section {
        padding-top: 4rem;
    }

    .model-showcase {
        min-height: auto;
        padding: 0.8rem;
    }

    .model-showcase::before {
        display: none;
    }

    .model-showcase model-viewer {
        height: 480px;
    }

    .robot-model-showcase model-viewer {
        height: 520px;
    }

    .robot-story-card {
        min-height: auto;
    }

    .robot-moment-card {
        min-height: 460px;
    }

    .model-showcase-copy {
        position: relative;
        left: auto;
        bottom: auto;
        max-width: none;
        margin-top: 0.8rem;
        padding: 1rem;
    }

    .source-grid {
        margin-top: 1rem;
    }
}