:root {
    --tobacco: #b59e7d;
    --vanilla: #f1eada;
    --mountain: #aaa396;
    --sand: #cec1a8;
    --mahogany: #584738;
    --gold: #c9a052;
    --dark-chocolate: #2b1e15;

    --bg-primary: #2f2117;
    --bg-secondary: #3c2a1f;
    --bg-surface: rgba(91, 73, 56, 0.85);
    --text-primary: #f8f3ed;
    --text-secondary: #d2c7ba;
    --accent: var(--tobacco);
    --accent-alt: var(--sand);
    --border-color: rgba(245, 234, 222, 0.18);
    --shadow-soft: 0 24px 60px rgba(47, 33, 23, 0.55);
    --card-radius: 18px;
    --transition: all 0.25s ease;
    --body-bg: radial-gradient(circle at 20% 20%, rgba(181, 158, 125, 0.35) 0%, transparent 40%), radial-gradient(circle at 80% 0%, rgba(206, 193, 168, 0.25) 0%, transparent 45%), linear-gradient(135deg, #1e140c 0%, #3f2b1f 45%, #1b110b 100%);
    --header-bg: linear-gradient(135deg, rgba(88, 71, 56, 0.85), rgba(46, 32, 23, 0.95));
    --section-surface: rgba(59, 42, 31, 0.88);
    --card-bg: rgba(88, 71, 56, 0.82);
    --card-top-border: rgba(201, 160, 82, 0.35);
    --timeline-border: rgba(201, 160, 82, 0.4);
    --nav-chip-bg: rgba(206, 193, 168, 0.14);
    --nav-chip-border: rgba(201, 160, 82, 0.15);
    --nav-chip-hover-bg: rgba(201, 160, 82, 0.25);
    --nav-chip-hover-border: rgba(201, 160, 82, 0.4);
    --toggle-bg: rgba(181, 158, 125, 0.2);
    --toggle-border: rgba(181, 158, 125, 0.4);
    --toggle-hover-bg: rgba(241, 234, 218, 0.3);
    --toggle-hover-border: rgba(241, 234, 218, 0.6);
    --hero-frame-border: rgba(241, 234, 218, 0.4);
    --hero-frame-shadow: 0 24px 60px rgba(20, 14, 10, 0.55);
    --project-pill-bg: rgba(181, 158, 125, 0.2);
    --pill-bg: rgba(206, 193, 168, 0.15);
    --pill-border: rgba(206, 193, 168, 0.35);
    --footer-bg: linear-gradient(135deg, rgba(46, 32, 23, 0.98), rgba(88, 71, 56, 0.9));
    --shimmer-color-1: rgba(255, 255, 255, 0.15);
    --shimmer-color-2: rgba(255, 255, 255, 0.32);
}

[data-accent="alt"] {
    --accent: var(--accent-alt);
}

[data-theme="night"] {
    --tobacco: #d3a561;
    --sand: #e8c2a2;
    --bg-primary: #0b0302;
    --bg-secondary: #170505;
    --bg-surface: rgba(25, 5, 6, 0.92);
    --text-primary: #fff8f2;
    --text-secondary: #f0cec4;
    --border-color: rgba(255, 205, 173, 0.25);
    --shadow-soft: 0 24px 60px rgba(16, 4, 2, 0.65);
    --body-bg: radial-gradient(circle at 18% 15%, rgba(120, 20, 24, 0.3) 0%, transparent 32%), radial-gradient(circle at 80% 0%, rgba(120, 57, 43, 0.25) 0%, transparent 42%), linear-gradient(140deg, #050101 0%, #130203 50%, #2a0609 100%);
    --header-bg: linear-gradient(150deg, rgba(23, 7, 4, 0.97), rgba(48, 20, 19, 0.94), rgba(77, 21, 25, 0.85));
    --section-surface: rgba(18, 3, 4, 0.94);
    --card-bg: rgba(28, 6, 7, 0.92);
    --card-top-border: rgba(255, 198, 157, 0.45);
    --timeline-border: rgba(255, 198, 157, 0.45);
    --nav-chip-bg: rgba(73, 18, 20, 0.5);
    --nav-chip-border: rgba(255, 198, 157, 0.25);
    --nav-chip-hover-bg: rgba(255, 198, 157, 0.35);
    --nav-chip-hover-border: rgba(255, 198, 157, 0.5);
    --toggle-bg: rgba(89, 72, 54, 0.3);
    --toggle-border: rgba(255, 198, 157, 0.35);
    --toggle-hover-bg: rgba(255, 198, 157, 0.35);
    --toggle-hover-border: rgba(255, 198, 157, 0.55);
    --hero-frame-border: rgba(255, 228, 205, 0.35);
    --hero-frame-shadow: 0 24px 60px rgba(5, 0, 0, 0.65);
    --project-pill-bg: rgba(210, 130, 96, 0.28);
    --pill-bg: rgba(93, 32, 34, 0.65);
    --pill-border: rgba(255, 198, 157, 0.3);
    --footer-bg: linear-gradient(135deg, rgba(23, 7, 4, 0.98), rgba(77, 21, 25, 0.92));
    --shimmer-color-1: rgba(255, 198, 157, 0.18);
    --shimmer-color-2: rgba(255, 198, 157, 0.36);
}

* {
    box-sizing: border-box;
}

html {
    font-size: 15px;
}

body {
    margin: 0;
    font-family: "Inter", Arial, sans-serif;
    background: var(--body-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.page-zoom {
    transform: scale(0.9);
    transform-origin: top center;
    width: calc(100% / 0.9);
    margin: 0 auto;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover,
a:focus {
    color: var(--vanilla);
}

img {
    max-width: 100%;
    display: block;
    border-radius: calc(var(--card-radius) - 6px);
}

.site-header {
    padding: 2.5rem clamp(1rem, 5vw, 4rem) 3rem;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
    position: relative;
    overflow: hidden;
}

.site-header::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent 25%, var(--shimmer-color-1) 40%, var(--shimmer-color-2) 50%, var(--shimmer-color-1) 60%, transparent 75%);
    transform: translateX(-100%);
    animation: hero-shimmer 12s linear infinite;
    pointer-events: none;
}

.site-header > * {
    position: relative;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.nav-controls {
    display: inline-flex;
    gap: 0.5rem;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
    color: var(--text-primary);
}
.hero::before,
.hero::after {
    content: "";
    position: absolute;
    border-radius: 24px;
    border: 1px solid rgba(201, 160, 82, 0.45);
    background: linear-gradient(135deg, rgba(201, 160, 82, 0.35), rgba(241, 234, 218, 0.05));
    box-shadow: 0 15px 35px rgba(201, 160, 82, 0.2);
    pointer-events: none;
}

.hero::before {
    width: clamp(160px, 25vw, 260px);
    height: clamp(90px, 18vw, 160px);
    top: -30px;
    right: 5%;
    transform: rotate(6deg);
    opacity: 0.45;
}

.hero::after {
    width: clamp(140px, 22vw, 220px);
    height: clamp(90px, 18vw, 150px);
    bottom: -35px;
    left: 2%;
    transform: rotate(-8deg);
    opacity: 0.35;
}


.nav-links {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: 1rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    background: transparent;
    border: none;
    box-shadow: none;
}

.nav-links a:hover,
.nav-links a:focus {
    background: transparent;
    color: var(--text-primary);
}

.toggle-button {
    background: transparent;
    border: none;
    color: var(--text-primary);
    border-radius: 999px;
    padding: 0.4rem 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.toggle-button:hover,
.toggle-button:focus-visible {
    background: transparent;
}

.hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 3rem;
    align-items: center;
}

@keyframes hero-shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}


.hero h1 {
    margin: 0.4rem 0 0;
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.15;
    color: var(--text-primary);
}

.hero-name {
    display: block;
    font-size: 0.62em;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.hero-headline {
    display: block;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.32em;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.lead {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 46ch;
}

.hero-media {
    position: relative;
    max-width: 320px;
    justify-self: center;
}

.hero-media img {
    border-radius: calc(var(--card-radius) + 6px);
    border: 2px solid var(--hero-frame-border);
    box-shadow: var(--hero-frame-shadow);
}

.hero-media figcaption {
    margin-top: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.btn {
    background: var(--accent);
    color: #2f2219;
    padding: 0.65rem 1.25rem;
    border-radius: 999px;
    font-weight: 600;
    border: 1px solid transparent;
    box-shadow: 0 12px 30px rgba(181, 158, 125, 0.4);
}

.btn:not(.ghost):active,
.btn:not(.ghost):focus-visible {
    background: var(--dark-chocolate);
    color: var(--vanilla);
    border-color: rgba(0, 0, 0, 0.3);
}

.btn.ghost {
    background: transparent;
    color: var(--text-primary);
    border: none;
    box-shadow: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px rgba(181, 158, 125, 0.45);
}

main {
    padding: 0 clamp(1rem, 5vw, 4rem) 4rem;
}

.section {
    margin-top: 4rem;
}

.section-heading {
    margin-bottom: 1.5rem;
    position: relative;
}

.section-eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.3em;
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.section h2 {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    margin: 0.25rem 0 0;
    color: var(--text-primary);
}

.section-heading::after {
    content: "";
    display: block;
    width: 92px;
    height: 2px;
    margin-top: 0.8rem;
    background: linear-gradient(90deg, transparent, rgba(201, 160, 82, 0.8), transparent);
}

.section-content {
    background: var(--section-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    box-shadow: var(--shadow-soft);
}

.quick-stats {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0;
    display: grid;
    gap: 0.75rem;
}

.quick-stats strong {
    color: var(--accent);
    font-weight: 600;
}

.grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.blog-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.blog-intro {
    margin: 0;
    color: var(--text-secondary);
    max-width: 65ch;
}

.blog-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.blog-card {
    padding: 0;
    overflow: hidden;
    gap: 0;
}

.blog-card figure {
    margin: 0;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-bottom: 1px solid rgba(0, 0, 0, 0.2);
}

.blog-card img {
    border-radius: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.blog-card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.blog-meta {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.blog-card h3 {
    margin: 0;
    font-size: 1.15rem;
}

.blog-brief {
    margin: 0;
    color: var(--text-secondary);
}

.blog-link {
    margin-top: auto;
    font-weight: 600;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.blog-link span {
    font-size: 1.2rem;
}

.blog-empty {
    margin: 0;
    background: rgba(0, 0, 0, 0.25);
    padding: 1rem 1.25rem;
    border-radius: var(--card-radius);
    color: var(--text-secondary);
    text-align: center;
}

.card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    padding: 1.75rem;
    border: 1px solid var(--border-color);
    border-top: 1px solid var(--card-top-border);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.card h3 {
    margin: 0;
    font-size: 1.2rem;
}

.card ul {
    padding-left: 1.1rem;
    margin: 0.5rem 0 0;
    color: var(--text-secondary);
}

.timeline {
    display: grid;
    gap: 1.5rem;
}

.timeline-virtual {
    margin-top: 2.5rem;
}

.timeline-group-title {
    margin: 0 0 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.timeline-item {
    padding: 1.75rem;
    border-radius: var(--card-radius);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 2px solid var(--timeline-border);
    position: relative;
    box-shadow: var(--shadow-soft);
}

.timeline-item::before {
    content: "";
    position: absolute;
    top: 1.5rem;
    left: -0.85rem;
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(181, 158, 125, 0.35);
}

.timeline-meta {
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.timeline-item ul {
    color: var(--text-secondary);
    padding-left: 1.25rem;
}

.inline-link {
    margin-top: 0.75rem;
}

.card-project header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
}

.card-project header a {
    font-size: 0.9rem;
}

.project-links {
    display: inline-flex;
    gap: 0.75rem;
    align-items: center;
}

.project-stat {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: var(--project-pill-bg);
    color: var(--vanilla);
    border-radius: 999px;
    padding: 0.3rem 0.75rem;
    font-size: 0.82rem;
    font-weight: 600;
}

.publication {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    padding: 1.75rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
}

.publication .meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0.4rem 0 1rem;
}

.pill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pill-list span {
    background: var(--pill-bg);
    color: var(--text-primary);
    border: 1px solid var(--pill-border);
    border-radius: 999px;
    padding: 0.35rem 0.85rem;
    font-size: 0.85rem;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.cert-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.cert-grid article h4 {
    margin: 0;
    font-size: 1.02rem;
    color: var(--text-primary);
}

.cert-grid ul {
    padding-left: 1.05rem;
    margin-top: 0.75rem;
    color: var(--text-secondary);
}

.references .card p {
    margin: 0;
    color: var(--text-secondary);
}

.site-footer {
    padding: 70px clamp(1rem, 5vw, 4rem) 45px;
    background: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    color: var(--text-primary);
}

.footer-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    margin-bottom: 28px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.footer-content h2 {
    margin: 0 0 12px 0;
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    color: var(--text-primary);
}

.footer-content p {
    margin: 0;
    line-height: 1.6;
    color: var(--text-secondary);
}

.footer-art {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    min-height: 160px;
    padding-top: 0;
}

.footer-butterfly {
    width: clamp(95px, 10vw, 160px);
    height: auto;
    object-fit: contain;
    opacity: 0.18;
    filter: invert(1) sepia(1) saturate(0.7) hue-rotate(330deg) brightness(1.2);
    transform: translateY(25px);
    pointer-events: none;
    user-select: none;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.social-links {
    display: flex;
    gap: 22px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.social-links a {
    font-weight: 500;
}

.back-to-top {
    display: inline-block;
    margin-top: 36px;
    margin-bottom: 0;
    color: var(--vanilla);
}

.footer-bottom p {
    margin-top: 26px;
    margin-bottom: 0;
    font-size: 0.9rem;
    color: #cbd5f5;
}

.footer-meta {
    color: #cbd5f5;
    font-size: 0.9rem;
}

@media (max-width: 720px) {
    html {
        font-size: 14px;
    }

    .site-nav {
        flex-wrap: wrap;
    }

    .site-footer {
        padding: 55px 24px 35px;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: left;
        margin-bottom: 20px;
    }

    .footer-content {
        gap: 18px;
    }

    .footer-art {
        min-height: 90px;
        justify-content: flex-start;
        padding-top: 0;
    }

    .footer-butterfly {
        width: 90px;
        opacity: 0.16;
        transform: translateY(10px);
    }

    .social-links {
        gap: 16px;
        margin-top: 8px;
    }

    .back-to-top {
        margin-top: 28px;
    }

    .footer-bottom p {
        margin-top: 20px;
    }

    .hero {
        gap: 2rem;
    }

    .timeline-item::before {
        display: none;
    }

    .nav-links a {
        background: var(--nav-chip-bg);
    }
}