:root {
    color-scheme: light;

    --font-body: "Source Sans 3", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --font-display: "Source Serif 4", Georgia, "Times New Roman", serif;

    --bg: #f3f2f2;
    --bg-soft: #eceef1;
    --surface: #ffffff;
    --surface-2: #f6f8fb;
    --text: #201f1d;
    --text-muted: #4a5563;
    --line: #d5dae2;
    --line-strong: #b7c1cf;

    --brand: #002e5d;
    --brand-2: #003da5;
    --brand-ink: #e6eef7;
    --accent: #a8c4e5;
    --accent-soft: #bdd6e6;
    --link: #003da5;
    --link-hover: #002e5d;

    --shadow-soft: 0 8px 28px rgba(0, 30, 60, 0.08);
    --shadow-card: 0 12px 38px rgba(0, 30, 60, 0.12);
}

:root[data-theme="dark"] {
    color-scheme: dark;

    --bg: #10141b;
    --bg-soft: #131a24;
    --surface: #171e29;
    --surface-2: #1d2635;
    --text: #edf2f8;
    --text-muted: #a9b7c9;
    --line: #2c3748;
    --line-strong: #3b4a60;

    --brand: #12457e;
    --brand-2: #2e6cb5;
    --brand-ink: #d9e7f6;
    --accent: #7ba7d9;
    --accent-soft: #5d86b8;
    --link: #8db8e8;
    --link-hover: #b4d3f2;

    --shadow-soft: 0 12px 32px rgba(0, 0, 0, 0.35);
    --shadow-card: 0 16px 40px rgba(0, 0, 0, 0.42);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    background:
        radial-gradient(circle at 2% -8%, rgba(0, 46, 93, 0.12), transparent 32%),
        radial-gradient(circle at 102% 3%, rgba(0, 61, 165, 0.10), transparent 30%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
    color: var(--text);
    font-family: var(--font-body);
    letter-spacing: 0.01em;
    line-height: 1.65;
    min-height: 100%;
}

.page-header {
    position: relative;
    overflow: hidden;
    padding: 4rem 1.5rem 4.5rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    background:
        linear-gradient(120deg, rgba(0, 26, 54, 0.97), rgba(0, 46, 93, 0.95) 52%, rgba(0, 38, 80, 0.96)),
        linear-gradient(200deg, rgba(168, 196, 229, 0.14), transparent 48%);
    box-shadow: var(--shadow-soft);
}

.page-header::before,
.page-header::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

.page-header::before {
    width: 340px;
    height: 340px;
    right: -120px;
    top: -140px;
    background: radial-gradient(circle, rgba(189, 214, 230, 0.2), transparent 70%);
}

.page-header::after {
    width: 260px;
    height: 260px;
    left: -120px;
    bottom: -130px;
    background: radial-gradient(circle, rgba(189, 214, 230, 0.12), transparent 68%);
}

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

.page-header__eyebrow {
    margin: 0 0 0.8rem;
    color: var(--accent-soft);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.site-name {
    margin: 0 auto;
    max-width: 20ch;
    color: #f2f7fc;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    line-height: 1.1;
}

.site-tagline {
    margin: 1rem auto 0.3rem;
    max-width: 60ch;
    color: #dce8f4;
    font-weight: 600;
    font-size: 1.05rem;
}

.page-header__links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.55rem;
    margin-top: 1.8rem;
}

.btn-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1.05rem;
    border: 1px solid rgba(189, 214, 230, 0.55);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: #f2f7fc;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.btn-pill:hover,
.btn-pill:focus-visible {
    transform: translateY(-1px);
    background: rgba(189, 214, 230, 0.2);
    border-color: var(--accent-soft);
}

.main-content {
    position: relative;
    max-width: 1000px;
    margin: -2rem auto 2.5rem;
    padding: 2.4rem 2.3rem 2.8rem;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
}

.main-content h2 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.45rem;
    line-height: 1.25;
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.4rem;
    margin: 0 0 1.4rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.2rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    padding: 1.4rem 1.5rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-2);
    color: var(--text);
    text-decoration: none;
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.project-card:hover,
.project-card:focus-visible {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card);
    border-color: var(--accent-soft);
}

.project-card__title {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.6rem;
    margin: 0 0 0.5rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--brand-2);
}

.project-card__arrow {
    color: var(--accent-soft);
    font-size: 1.1rem;
    transition: transform 180ms ease;
}

.project-card:hover .project-card__arrow {
    transform: translateX(3px);
}

.project-card__desc {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.55;
}

.affiliation-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.6rem;
    margin: 0 0 1.4rem;
}

.affiliation-strip img {
    height: 52px;
    width: auto;
}

.site-footer {
    max-width: 1000px;
    margin: 0 auto 2.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.site-footer a {
    color: var(--link);
}

.site-footer__ai {
    margin-top: 0.3rem;
    font-size: 0.78rem;
    opacity: 0.8;
}

@media (max-width: 700px) {
    .main-content {
        margin: -1.4rem 0.8rem 2rem;
        padding: 1.6rem 1.2rem 2rem;
        border-radius: 12px;
    }
}

@media (prefers-reduced-motion: no-preference) {
    .page-header,
    .main-content {
        animation: riseIn 540ms ease-out both;
    }

    .main-content {
        animation-delay: 100ms;
    }
}

html.reduce-motion *,
html.reduce-motion *::before,
html.reduce-motion *::after {
    animation: none !important;
    transition: none !important;
}

@keyframes riseIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}