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

:root {
    --bg:         #07070e;
    --bg-2:       #0e0c1a;
    --bg-card:    #120f1e;
    --accent:     #a855f7;
    --accent-dim: rgba(168, 85, 247, 0.12);
    --text:       #e2e2f0;
    --text-muted: #6a6a8a;
    --border:     #1e1a30;
    --font-main:  'Space Grotesk', sans-serif;
    --font-mono:  'JetBrains Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Navbar ─────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 6%;
    background: rgba(8, 8, 15, 0.85);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}

.nav-brand {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: 0.06em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: color 0.2s;
}

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

/* ── Main ───────────────────────────────────────── */
main {
    flex: 1;
    padding-top: 4.5rem;
}

/* ── Footer ─────────────────────────────────────── */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-family: var(--font-mono);
    border-top: 1px solid var(--border);
}

.footer span { color: var(--accent); }

/* ── Utilities ───────────────────────────────────── */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 6%;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    font-weight: 700;
    margin-bottom: 0.4rem;
    letter-spacing: -0.02em;
}

.section-title span { color: var(--accent); }

.section-subtitle {
    color: var(--text-muted);
    font-size: 0.93rem;
    margin-bottom: 3.5rem;
}

.tag {
    display: inline-block;
    padding: 0.22rem 0.65rem;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 4px;
    font-size: 0.72rem;
    font-family: var(--font-mono);
    font-weight: 500;
    letter-spacing: 0.03em;
}

/* ── Buttons ─────────────────────────────────────── */
.btn-primary {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    background: var(--accent);
    color: #ffffff;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.88rem;
    transition: opacity 0.2s, transform 0.2s;
    border: none;
    cursor: pointer;
    font-family: var(--font-main);
}

.btn-primary:hover {
    opacity: 0.82;
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.88rem;
    transition: border-color 0.2s, transform 0.2s;
}

.btn-secondary:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* ── Mobile nav ──────────────────────────────────── */
@media (max-width: 600px) {
    .navbar { flex-direction: column; gap: 1rem; padding: 1rem 6%; }
    .nav-links { gap: 1.25rem; flex-wrap: wrap; justify-content: center; }
}