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

:root {
    --text: #1a1a1a;
    --text-secondary: #555;
    --text-tertiary: #888;
    --bg: #fafaf8;
    --bg-card: #fff;
    --border: #e0e0dc;
    --accent: #2a2a2a;
    --link: #1a1a1a;
    --link-hover: #666;
    --max-width: 860px;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 17px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--link);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    transition: color 0.2s;
}

a:hover {
    color: var(--link-hover);
}

/* ─── Navigation ─── */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background: rgba(250, 250, 248, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
}

.nav-name {
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 0.02em;
    margin-right: var(--space-md);
}

.nav-links {
    display: flex;
    gap: var(--space-md);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
}

.nav-links a:hover {
    color: var(--text);
}

.design-switch {
    color: var(--text-tertiary) !important;
    border-left: 1px solid var(--border);
    padding-left: var(--space-md);
    margin-left: 0;
}

/* ─── Header / About ─── */

header {
    padding: calc(var(--space-xl) + 60px) var(--space-md) var(--space-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.welcome {
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.01em;
}

header h1 {
    font-size: 3rem;
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xs);
}

.subtitle {
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
    text-transform: lowercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    margin-bottom: var(--space-md);
}

.bio {
    max-width: 640px;
    color: var(--text-secondary);
    font-size: 17px;
    line-height: 1.7;
}

.bio p + p {
    margin-top: var(--space-sm);
}

.bio .callout {
    margin-top: var(--space-md);
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
    color: var(--text-tertiary);
    letter-spacing: 0.01em;
}

.areas {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
    max-width: 640px;
}

/* ─── Sections ─── */

section, footer {
    padding: var(--space-xl) var(--space-md);
    max-width: var(--max-width);
    margin: 0 auto;
}

section {
    border-top: 1px solid var(--border);
}

h2 {
    font-size: 1.6rem;
    font-weight: 400;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.01em;
}

.section-intro {
    color: var(--text-secondary);
    margin-top: calc(var(--space-lg) * -0.6);
    margin-bottom: var(--space-lg);
    font-size: 16px;
}

/* ─── CV / Academic Entries ─── */

.subsection {
    margin-bottom: var(--space-lg);
}

.subsection h3 {
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--border);
}

.cv-entry {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
}

.cv-year {
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
    color: var(--text-tertiary);
    min-width: 70px;
    padding-top: 2px;
}

.cv-detail {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.cv-detail strong {
    font-weight: 600;
    font-size: 16px;
}

.cv-detail span {
    font-size: 15px;
    color: var(--text-secondary);
}

.paper-link {
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 4px;
    display: inline-block;
}

/* ─── Art / Project Grid ─── */

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.project-card {
    text-decoration: none;
    color: var(--text);
    transition: transform 0.2s ease;
}

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

.project-card:hover .project-thumb {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.project-thumb {
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: 4px;
    margin-bottom: var(--space-sm);
    transition: box-shadow 0.2s ease;
}

.project-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.project-info strong {
    font-size: 16px;
    font-weight: 600;
}

.project-info span {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

/* ─── Writing Entries ─── */

.writing-entry {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
}

.writing-date {
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
    color: var(--text-tertiary);
    min-width: 70px;
    padding-top: 2px;
}

.writing-detail {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.writing-detail a {
    text-decoration: none;
}

.writing-detail a:hover strong {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.writing-detail strong {
    font-size: 16px;
    font-weight: 600;
}

.writing-detail span {
    font-size: 15px;
    color: var(--text-secondary);
}

/* ─── Footer / Contact ─── */

footer {
    border-top: 1px solid var(--border);
    padding-bottom: var(--space-xl);
}

footer h2 {
    margin-bottom: var(--space-sm);
}

footer p {
    margin-bottom: var(--space-sm);
}

footer a {
    font-size: 17px;
}

.footer-links {
    display: flex;
    gap: var(--space-md);
    font-family: -apple-system, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--text);
}

.bunny {
    margin-top: var(--space-md);
    font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
    font-size: 11px;
    line-height: 1.15;
    color: var(--text-tertiary);
    white-space: pre;
    overflow-x: auto;
}

/* ─── Responsive ─── */

@media (max-width: 680px) {
    body {
        font-size: 16px;
    }

    nav {
        padding: var(--space-sm);
    }

    .nav-links {
        gap: var(--space-sm);
    }

    header {
        padding-top: calc(var(--space-lg) + 60px);
    }

    header h1 {
        font-size: 2.2rem;
    }

    .bio {
        font-size: 16px;
    }

    section, footer {
        padding: var(--space-lg) var(--space-sm);
    }

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

    .cv-entry, .writing-entry {
        flex-direction: column;
        gap: 2px;
    }

    .cv-year, .writing-date {
        min-width: unset;
    }
}