/* ============ Design tokens ============ */
:root {
    --bg: #fafaf9;
    --bg-raised: #ffffff;
    --text: #1c1917;
    --text-muted: #57534e;
    --accent: #0d7377;
    --accent-strong: #0a5c5f;
    --border: #e7e5e4;
    --shadow: 0 1px 3px rgb(0 0 0 / 0.06), 0 6px 16px rgb(0 0 0 / 0.05);
    --shadow-hover: 0 2px 6px rgb(0 0 0 / 0.07), 0 12px 28px rgb(0 0 0 / 0.09);
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #131211;
        --bg-raised: #1d1b1a;
        --text: #f0eeec;
        --text-muted: #a8a29e;
        --accent: #2dd43b;
        --accent-strong: #5eea65;
        --border: #2e2b29;
        --shadow: 0 1px 3px rgb(0 0 0 / 0.4), 0 6px 16px rgb(0 0 0 / 0.3);
        --shadow-hover: 0 2px 6px rgb(0 0 0 / 0.45), 0 12px 28px rgb(0 0 0 / 0.4);
        color-scheme: dark;
    }
}

/* ============ Base ============ */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, sans-serif;
    font-size: 1rem;
    line-height: 1.65;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1080px;
    margin-inline: auto;
    padding-inline: 24px;
}

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

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.6em; }

/* ============ Header ============ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding-block: 14px;
}

.wordmark {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--text);
}
.wordmark:hover { text-decoration: none; }
.accent { color: var(--accent); }

.nav-links {
    display: flex;
    gap: 22px;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 0.92rem;
    font-weight: 500;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ============ Hero ============ */
.hero {
    padding-block: clamp(70px, 14vh, 150px) clamp(50px, 9vh, 100px);
}

.kicker {
    font-family: "JetBrains Mono", monospace;
    color: var(--accent);
    margin: 0 0 8px;
    font-size: 0.95rem;
}

.hero h1 {
    font-size: clamp(2.6rem, 7vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0;
}

.hero-role {
    font-size: clamp(1.3rem, 3.5vw, 2rem);
    font-weight: 700;
    color: var(--text-muted);
    margin: 4px 0 20px;
    letter-spacing: -0.01em;
}

.hero-tagline {
    max-width: 560px;
    color: var(--text-muted);
    font-size: 1.08rem;
    margin: 0 0 32px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ============ Buttons ============ */
.btn {
    display: inline-block;
    padding: 10px 22px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-raised);
    color: var(--text);
    font-weight: 600;
    font-size: 0.95rem;
    transition: border-color 0.15s ease, transform 0.15s ease;
}
.btn:hover {
    text-decoration: none;
    border-color: var(--accent);
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}
.btn-primary:hover {
    background: var(--accent-strong);
    border-color: var(--accent-strong);
}

@media (prefers-color-scheme: dark) {
    .btn-primary { color: #0f1413; }
}

/* ============ Sections ============ */
.section { padding-block: clamp(48px, 8vh, 80px); }

.section h2 {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 28px;
}

.section-num {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.85em;
    font-weight: 400;
    color: var(--accent);
    margin-right: 6px;
}

.about-text, .contact-text {
    max-width: 680px;
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-top: 0;
}
.contact-text { margin-bottom: 28px; }

/* ============ Projects ============ */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
    gap: 20px;
}

.card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.card h3 { font-size: 1.12rem; margin-bottom: 10px; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); text-decoration: none; }

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0 0 18px;
}

.badge-wip {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.15em 0.5em;
    margin-left: 0.5em;
    border-radius: 4px;
    vertical-align: middle;
    color: #b45309;
    background: rgba(217, 119, 6, 0.12);
    border: 1px solid rgba(217, 119, 6, 0.3);
}

/* ============ Tags ============ */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.tags li {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.74rem;
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    border-radius: 999px;
    padding: 3px 11px;
    white-space: nowrap;
}

/* ============ Skills ============ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.skill-group h3 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 14px;
}

/* ============ Footer ============ */
.site-footer {
    border-top: 1px solid var(--border);
    padding-block: 28px;
    margin-top: 40px;
}
.site-footer p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.88rem;
    text-align: center;
}

/* ============ Scroll reveal ============ */
.reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .card, .btn { transition: none; }
}