:root {
    --bg: #0b0b0b;
    --surface: #141414;
    --surface-2: #1a1a1a;
    --fg: #fafafa;
    --muted: #a3a3a3;
    --border: #262626;
    --accent: #ffffff;
    --accent-fg: #0b0b0b;
    --green: #7ee787;
    --radius: 10px;
    --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-mono: "SFMono-Regular", "JetBrains Mono", "Fira Code", ui-monospace, Menlo, Consolas, monospace;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

html,
body {
    margin: 0;
    height: 100%;
}

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
}

main {
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

code {
    font-family: var(--font-mono);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.1rem 0.4rem;
    font-size: 0.9em;
    color: var(--green);
}

/* Nav */
.nav-wrap {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 11, 11, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav {
    max-width: 72rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
}

.nav-brand {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
}

.nav-brand .dim {
    color: var(--muted);
}

.nav-links {
    display: flex;
    gap: 1.75rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--muted);
}

.nav-links a {
    transition: color 0.15s ease;
}

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

/* Hero */
.hero {
    max-width: 46rem;
    margin: 0 auto;
    padding: 7rem 1.5rem 5rem;
    text-align: left;
}

.hero-kicker {
    font-family: var(--font-mono);
    color: var(--green);
    font-size: 0.95rem;
    margin: 0 0 1rem;
}

.hero h1 {
    font-size: clamp(2.5rem, 7vw, 4rem);
    letter-spacing: -0.03em;
    margin: 0 0 0.6rem;
    font-weight: 700;
}

.hero-tagline {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    color: var(--fg);
    margin: 0 0 0.75rem;
    font-weight: 500;
}

.hero-sub {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.6;
    margin: 0 0 2rem;
}

.hero-links {
    display: flex;
    gap: 0.85rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.92rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-fg);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: #e5e5e5;
}

.btn-ghost {
    background: transparent;
    color: var(--fg);
}

.btn-ghost:hover {
    border-color: var(--fg);
}

/* Sections */
.section {
    max-width: 72rem;
    margin: 0 auto;
    padding: 4.5rem 1.5rem;
    border-top: 1px solid var(--border);
}

.section-title {
    font-size: 1.75rem;
    letter-spacing: -0.02em;
    margin: 0 0 2rem;
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
}

.tag-num {
    font-family: var(--font-mono);
    color: var(--green);
    font-size: 1.1rem;
    font-weight: 400;
}

.about-content {
    max-width: 42rem;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.75;
}

.about-content p {
    margin: 0 0 1rem;
}

.about-content strong {
    color: var(--fg);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover {
    transform: translateY(-3px);
    border-color: #3a3a3a;
}

.card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.card-top h3 {
    margin: 0;
    font-size: 1.1rem;
    letter-spacing: -0.01em;
}

.lang {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--green);
    background: rgba(126, 231, 135, 0.1);
    border: 1px solid rgba(126, 231, 135, 0.25);
    border-radius: 999px;
    padding: 0.2rem 0.6rem;
    white-space: nowrap;
}

.card p {
    color: var(--muted);
    margin: 0;
    line-height: 1.5;
    flex-grow: 1;
}

.card-link {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--fg);
    border-top: 1px solid var(--border);
    padding-top: 0.75rem;
    transition: color 0.15s ease;
}

.card-link:hover {
    color: var(--green);
}

/* Contact */
.contact-content {
    max-width: 34rem;
}

.contact-content p {
    color: var(--muted);
    font-size: 1.1rem;
    margin: 0 0 1.5rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2.5rem 1.5rem 3rem;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
    .nav-links {
        gap: 1.1rem;
        font-size: 0.82rem;
    }

    .hero {
        padding: 5.5rem 1.25rem 3.5rem;
    }

    .section {
        padding: 3rem 1.25rem;
    }
}