:root {
    --bg: #0d0d0d;
    --fg: #e8e4df;
    --muted: #7a7672;
    --accent: #b8860b;
    --card: #161616;
    --border: #2a2a2a;
    --glow: rgba(184, 134, 11, 0.3);
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: ui-monospace, 'Cascadia Code', 'Consolas', monospace;
    --text-body: 1rem;
    --text-body-sm: 0.9375rem;
    --leading-body: 1.75;
    --eyebrow-size: 0.75rem;
    --eyebrow-tracking: 0.14em;
}

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

html {
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--fg);
    line-height: var(--leading-body);
    font-weight: 300;
    overflow-x: hidden;
    cursor: default;
}

h1, h2, h3 {
    font-family: var(--font-serif);
    font-weight: 400;
}

code {
    font-family: var(--font-mono);
    font-size: 0.88em;
    color: var(--fg);
    background: rgba(255, 255, 255, 0.04);
    padding: 0.1em 0.35em;
    border-radius: 3px;
}

/* Skip to content */
.skip-link {
    position: fixed;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--bg);
    padding: 0.75rem 1.5rem;
    z-index: 9999;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 1rem;
}

/* Progress Track - Left Side */
.progress-track {
    position: fixed;
    left: 2.5rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 1rem 0.85rem;
    border-radius: 999px;
    background: rgba(13, 13, 13, 0.35);
    border: 1px solid rgba(42, 42, 42, 0.45);
    backdrop-filter: blur(14px);
    transition: all 0.3s ease;
}

.progress-track:hover {
    border-color: rgba(184, 134, 11, 0.35);
    background: rgba(13, 13, 13, 0.6);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

.progress-track:focus-within {
    border-color: rgba(184, 134, 11, 0.35);
    background: rgba(13, 13, 13, 0.6);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

.progress-bar {
    width: 1px;
    height: 140px;
    background: var(--border);
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: var(--accent);
    transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-markers {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 1.5rem;
}

.progress-markers span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.progress-markers span.active {
    background: var(--accent);
    transform: scale(1.3);
}

/* Progress TOC - Table of Contents */
.progress-toc {
    position: absolute;
    left: calc(100% + 1rem);
    top: 50%;
    transform: translateY(-50%) translateX(-10px);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 1001;
    min-width: 11rem;
}

.progress-track:hover .progress-toc {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) translateX(0);
}

.progress-track:focus-within .progress-toc {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) translateX(0);
}

.toc-item {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    white-space: nowrap;
    background: rgba(22, 22, 22, 0.9);
    border: 1px solid rgba(42, 42, 42, 0.9);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.toc-item:hover {
    color: var(--fg);
    border-color: var(--accent);
    background: var(--card);
}

.toc-item.active {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(184, 134, 11, 0.1);
}

/* Marker tooltip */
.progress-markers span::before {
    content: attr(data-title);
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    font-size: 0.75rem;
    color: var(--muted);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    padding: 0.25rem 0.5rem;
    background: var(--card);
    border-radius: 4px;
}

.progress-markers span:hover::before {
    opacity: 1;
}

.progress-markers span:focus {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

/* Keyboard hint */
.keyboard-hint {
    position: fixed;
    bottom: 2rem;
    left: 2.5rem;
    font-size: 0.7rem;
    color: var(--muted);
    opacity: 0.5;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 1000;
}

.keyboard-hint kbd {
    background: var(--card);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    border: 1px solid var(--border);
    font-family: inherit;
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    border-color: var(--accent);
    background: var(--bg);
}

.back-to-top svg {
    width: 18px;
    height: 18px;
    stroke: var(--fg);
    transition: stroke 0.3s ease;
}

.back-to-top:hover svg {
    stroke: var(--accent);
}

/* Presentation Container */
.presentation {
    position: relative;
}

/* Each Slide */
.slide {
    min-height: 100vh;
    scroll-snap-align: start;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 8rem 2.5rem 10rem;
    position: relative;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeRise {
    from {
        opacity: 0;
        transform: translateY(32px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeRiseLeft {
    from {
        opacity: 0;
        transform: translateX(-28px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeRiseRight {
    from {
        opacity: 0;
        transform: translateX(28px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes softFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-6px) scale(1.01);
    }
}

@keyframes sheen {
    0% {
        transform: translateX(-120%) skewX(-18deg);
        opacity: 0;
    }
    20% {
        opacity: 0.35;
    }
    100% {
        transform: translateX(140%) skewX(-18deg);
        opacity: 0;
    }
}

.slide-content {
    width: 100%;
    max-width: 1400px;
}

.slide-number {
    font-family: var(--font-serif);
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--muted);
    letter-spacing: 0.15em;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.slide-number::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, var(--border), transparent);
    max-width: 100px;
}

/* Opening Slide */
.slide[data-slide="0"] .slide-body {
    text-align: center;
    padding: 2.5rem 0;
}

.slide[data-slide="0"] .label,
.section-leadin,
.project-year,
.detail-label,
.stack-label {
    font-family: var(--font-sans);
    font-size: var(--eyebrow-size);
    font-weight: 400;
    letter-spacing: var(--eyebrow-tracking);
    text-transform: uppercase;
    color: var(--muted);
}

.brand-mark {
    position: fixed;
    top: 1.5rem;
    right: 2rem;
    z-index: 1002;
    padding: 0.45rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(13, 13, 13, 0.7);
    backdrop-filter: blur(8px);
}

.slide[data-slide="0"] h1 {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 7rem);
    font-weight: 300;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 1.2rem;
}

.hero-actions {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem 1.25rem;
    margin-top: 1.25rem;
}

.hero-link,
.cv-download {
    color: var(--muted);
    text-decoration: none;
    font-size: var(--text-body-sm);
    font-weight: 400;
    letter-spacing: 0.04em;
    text-transform: none;
    padding: 0.65rem 1rem;
    border: 1px solid transparent;
    border-bottom: 1px solid var(--border);
    background: transparent;
    transition: all 0.3s ease;
}

.cv-download {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0;
}

.hero-link:hover,
.hero-link:focus,
.cv-download:hover,
.cv-download:focus {
    color: var(--fg);
    border-bottom-color: var(--accent);
}

/* Project Slides */
.project-slide {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.slide.visible .project-slide .project-text {
    animation: fadeRiseLeft 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.slide.visible .project-slide.reverse .project-text {
    animation: fadeRiseRight 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.slide.visible .project-slide .project-visual {
    animation: fadeRiseRight 1s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.slide.visible .project-slide.reverse .project-visual {
    animation: fadeRiseLeft 1s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.slide.visible .project-slide .project-year,
.slide.visible .project-slide h2,
.slide.visible .project-slide .project-category,
.slide.visible .project-slide .project-desc,
.slide.visible .project-slide .project-meta,
.slide.visible .project-slide .project-links {
    animation: fadeRise 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.slide.visible .project-slide .project-category {
    animation-delay: 0.08s;
}

.slide.visible .project-slide h2 {
    animation-delay: 0.12s;
}

.slide.visible .project-slide .project-desc {
    animation-delay: 0.18s;
}

.slide.visible .project-slide .project-meta {
    animation-delay: 0.24s;
}

.slide.visible .project-slide .project-links {
    animation-delay: 0.3s;
}

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

.project-slide.reverse .project-text {
    order: 2;
}

.project-slide.reverse .project-visual {
    order: 1;
}

.project-year {
    margin-bottom: 1rem;
}

.project-slide h2 {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.project-slide h2:hover {
    color: var(--accent);
}

.project-category {
    font-family: var(--font-sans);
    font-size: var(--text-body-sm);
    color: var(--accent);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
}

.section-leadin {
    margin-bottom: 1.5rem;
}

.project-purpose {
    font-size: 0.95rem;
    color: var(--muted);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project-desc {
    font-size: var(--text-body);
    line-height: var(--leading-body);
    color: var(--fg);
    margin-bottom: 1.25rem;
    font-weight: 300;
    max-width: 450px;
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.project-meta span {
    font-size: 0.8rem;
    color: var(--muted);
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    font-weight: 400;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
    cursor: default;
}

.project-meta span:hover {
    border-color: var(--accent);
    color: var(--fg);
}

.project-meta span:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.project-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.2rem;
}

.project-link[target="_blank"]::after,
.cert-links a[target="_blank"]::after,
a.external::after {
    content: ' ↗';
    font-size: 0.82em;
    opacity: 0.75;
    text-decoration: none;
}

.project-link {
    display: inline-block;
    color: var(--fg);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--accent);
    padding-bottom: 2px;
    transition: all 0.3s ease;
}

.project-link:hover {
    color: var(--accent);
}

.project-link:focus {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

.project-visual {
    position: relative;
    overflow: hidden;
    border-radius: 0 0 4px 4px;
    display: block;
    width: 100%;
    padding: 0;
    border: none;
    background: transparent;
    cursor: zoom-in;
    font: inherit;
    text-align: left;
}

.slide.visible .project-visual {
    transform-origin: center;
}

.slide.visible .project-visual:hover {
    animation: softFloat 4s ease-in-out infinite;
}

.project-visual img {
    width: 100%;
    height: auto;
    display: block;
    filter: grayscale(20%);
    transition: all 0.6s ease;
    transform: scale(1);
}

.project-visual:hover img {
    filter: grayscale(0%);
    transform: scale(1.04);
}

.project-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid transparent;
    border-radius: 4px;
    transition: border-color 0.3s ease;
    pointer-events: none;
}

.project-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(115deg, transparent 35%, rgba(255, 255, 255, 0.12) 50%, transparent 65%);
    transform: translateX(-120%) skewX(-18deg);
    pointer-events: none;
}

.slide.visible .project-visual::before {
    animation: sheen 1.8s ease 0.35s both;
}

.project-visual:hover::after {
    border-color: var(--accent);
}

/* Image reveal animation */
.project-visual.reveal-img img {
    opacity: 0;
    transform: scale(1.1);
}

.project-visual.reveal-img.visible img {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.9s ease, transform 0.9s ease;
}

.slide.visible .project-visual.reveal-img.visible img {
    animation: fadeRiseRight 0.95s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

/* About Slide */
.about-slide {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.about-intro h2 {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    margin-bottom: 1.2rem;
}

.about-intro p {
    font-size: var(--text-body);
    line-height: var(--leading-body);
    color: var(--fg);
    font-weight: 300;
}

.about-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.detail-block {
    padding: 1.1rem 1.25rem;
    background: var(--card);
    border-radius: 4px;
    border: 1px solid var(--border);
    transition: border-color 0.3s ease;
}

.detail-block:hover {
    border-color: var(--accent);
}

.detail-label {
    margin-bottom: 0.75rem;
}

.detail-text {
    font-size: var(--text-body);
    line-height: var(--leading-body);
    color: var(--fg);
    font-weight: 300;
}

.cert-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.85rem;
}

.cert-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 2px;
    transition: all 0.3s ease;
}

.cert-links a:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.cert-links a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

/* Stack + Contact slides */
.stack-only,
.contact-only {
    width: 100%;
    margin: 0 auto;
}

.stack-only {
    max-width: 1100px;
}

.contact-only {
    max-width: 720px;
}

.stack-section {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 2rem 2.5rem;
}

.contact-section {
    background: #0f0f0f;
    border: 1px solid rgba(184, 134, 11, 0.35);
    border-radius: 14px;
    padding: 2.5rem 2.75rem;
    text-align: center;
}

.stack-section h2,
.contact-section h2 {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    text-transform: none;
    color: var(--fg);
}

.contact-section h2 {
    letter-spacing: -0.02em;
}

.contact-closer {
    color: var(--fg);
    font-size: var(--text-body);
    line-height: var(--leading-body);
    margin-bottom: 0.35rem;
    font-weight: 400;
}

.contact-sub {
    color: var(--muted);
    font-size: var(--text-body-sm);
    line-height: var(--leading-body);
    margin-bottom: 1.5rem;
    font-weight: 300;
}

.stack-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.stack-col {
    padding: 1rem 1.1rem;
    border-radius: 8px;
    background: #121212;
    border: 1px solid var(--border);
    transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.stack-col:hover {
    background: #161616;
    border-color: var(--accent);
    transform: translateY(-2px);
}

.stack-label {
    margin-bottom: 0.75rem;
}

.stack-items {
    font-size: var(--text-body-sm);
    line-height: var(--leading-body);
    color: var(--fg);
    font-weight: 300;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    align-items: stretch;
}

.contact-links a,
.contact-link {
    color: var(--fg);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: var(--text-body-sm);
    font-weight: 400;
    letter-spacing: 0.02em;
    text-transform: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 1.2rem;
    border-radius: 999px;
    border: 1px solid rgba(122, 118, 114, 0.35);
    background: transparent;
    justify-content: center;
}

.contact-link-primary {
    border-color: rgba(184, 134, 11, 0.55);
    background: rgba(184, 134, 11, 0.08);
}

.contact-link-primary:hover {
    background: rgba(184, 134, 11, 0.14);
}

.contact-links a:hover,
.contact-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-1px);
}

.contact-links a:focus,
.contact-link:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.contact-links a svg {
    width: 18px;
    height: 18px;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.contact-links a:hover svg {
    opacity: 1;
}

/* Mobile Progress Dots */
.mobile-progress {
    display: none;
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    gap: 8px;
    z-index: 1000;
    padding: 0.5rem 1rem;
    background: var(--card);
    border-radius: 20px;
    border: 1px solid var(--border);
}

.mobile-progress span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--border);
    transition: all 0.3s ease;
    cursor: pointer;
}

.mobile-progress span.active {
    background: var(--accent);
    transform: scale(1.2);
}

/* Focus visible for accessibility */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Responsive */
@media (max-width: 1024px) {
    .slide {
        padding: 2.5rem 2rem 2.5rem 5rem;
    }

    .progress-track {
        left: 1.5rem;
    }

    .keyboard-hint {
        display: none;
    }

    .project-slide,
    .project-slide.reverse,
    .about-slide,
    .final-slide {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .project-slide.reverse .project-text,
    .project-slide.reverse .project-visual {
        order: unset;
    }

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

    .detail-block {
        padding: 1rem;
    }
}

@media (max-width: 600px) {
    html {
        scroll-snap-type: none;
    }

    .slide {
        padding: 1.5rem 1.25rem 2.5rem 1.25rem;
        min-height: auto;
        scroll-snap-align: none;
    }

    .progress-track {
        display: none;
    }

    .mobile-progress {
        display: flex;
    }

    .creative-nav {
        display: none;
    }

    .slide-number {
        margin-bottom: 1.5rem;
    }

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

    .back-to-top {
        bottom: 5rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }

    .contact-links a {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .project-meta span {
        font-size: 0.75rem;
        padding: 0.4rem 0.75rem;
    }

    .detail-block {
        padding: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Mobile slide label */
.slide-indicator {
    display: none;
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1001;
    align-items: center;
    gap: 0.65rem;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(13, 13, 13, 0.88);
    backdrop-filter: blur(8px);
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    color: var(--muted);
    pointer-events: none;
}

.slide-indicator-title {
    color: var(--fg);
}

.slide-indicator-count {
    opacity: 0.75;
}

.slide-indicator-count::before {
    content: '·';
    margin-right: 0.65rem;
    opacity: 0.5;
}

/* Intro scroll hint */
.scroll-hint {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    margin-top: 2rem;
    font-family: var(--font-sans);
    font-size: var(--eyebrow-size);
    font-weight: 400;
    letter-spacing: var(--eyebrow-tracking);
    text-transform: uppercase;
    color: var(--muted);
    opacity: 0.7;
    transition: opacity 0.4s ease;
}

.scroll-hint svg {
    width: 18px;
    height: 18px;
    animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-hint.is-hidden {
    opacity: 0;
    pointer-events: none;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

/* Stack / about scroll on small viewports */
.stack-scroll {
    max-height: none;
    overflow: visible;
}

@media (max-width: 900px) {
    .stack-scroll {
        max-height: min(52vh, 440px);
        overflow-y: auto;
        padding-right: 0.35rem;
        margin-right: -0.35rem;
        scrollbar-width: thin;
        scrollbar-color: var(--border) transparent;
    }

    .about-details {
        max-height: min(48vh, 400px);
        overflow-y: auto;
        padding-right: 0.35rem;
        scrollbar-width: thin;
        scrollbar-color: var(--border) transparent;
    }
}

/* Browser frame mockups */
.browser-frame {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: #111;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.browser-chrome {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 0.75rem;
    background: #1a1a1a;
    border-bottom: 1px solid var(--border);
}

.browser-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #3a3a3a;
}

.browser-dot:nth-child(1) { background: #5c4a3a; }
.browser-dot:nth-child(2) { background: #4a4a35; }
.browser-dot:nth-child(3) { background: #354a35; }

.browser-url {
    margin-left: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.68rem;
    color: var(--muted);
    letter-spacing: 0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* AWS lab flow diagram */
.aws-flow {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.aws-node {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #121212;
    font-family: var(--font-sans);
    font-size: var(--text-body-sm);
    font-weight: 400;
}

.aws-node--accent {
    border-color: rgba(255, 153, 0, 0.45);
    background: rgba(255, 153, 0, 0.06);
}

.aws-svc {
    color: var(--fg);
    font-weight: 400;
}

.aws-lab {
    font-size: 0.68rem;
    letter-spacing: var(--eyebrow-tracking);
    text-transform: uppercase;
    color: var(--muted);
}

.aws-connector {
    width: 2px;
    height: 14px;
    margin: 0 auto;
    background: linear-gradient(to bottom, var(--border), rgba(184, 134, 11, 0.5));
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: rgba(0, 0, 0, 0.88);
    backdrop-filter: blur(6px);
}

.lightbox[hidden] {
    display: none;
}

.lightbox img {
    max-width: min(1200px, 95vw);
    max-height: 90vh;
    border-radius: 6px;
    border: 1px solid var(--border);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--card);
    color: var(--fg);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.lightbox-close:hover {
    border-color: var(--accent);
}

.contact-link[target="_blank"]::after {
    content: ' ↗';
    font-size: 0.82em;
    opacity: 0.7;
}

@media (max-width: 600px) {
    .slide-indicator {
        display: flex;
    }

    .brand-mark {
        top: 1.5rem;
        bottom: auto;
        right: 1rem;
    }

    .scroll-hint {
        margin-top: 1.5rem;
    }
}