/* =========================================================
   Design tokens — change a value here, it updates everywhere.
   This is the one CSS concept worth understanding first.
   ========================================================= */
:root {
  --bg: #0a0a0f;
  --surface: #13131c;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f2f2f5;
  --text-muted: #9599a8;
  --accent-1: #4f6df5;
  --accent-2: #9333ea;
  --gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.6;
}

h1, h2, h3, .nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.15;
}

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

/* ================= Nav ================= */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 6vw;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 16px;
}

.nav-logo {
  font-size: 1.25rem;
}

.nav-logo .dot {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  border-color: var(--accent-1);
}

.nav-resume {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
}

/* ================= Hero (home page) ================= */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14vh 6vw 10vh;
}

.eyebrow {
  color: var(--accent-1);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin: 0 0 20px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  color: var(--text-muted);
  max-width: 540px;
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform 0.15s, opacity 0.15s;
}

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

.btn-primary {
  background: var(--gradient);
  color: white;
}

.btn-secondary {
  background: var(--surface);
  border: 1px solid var(--border);
}

.btn-ghost {
  color: var(--accent-1);
  padding-left: 4px;
}

/* ================= Generic content page (about, etc.) ================= */
.page {
  max-width: 700px;
  margin: 0 auto;
  padding: 10vh 6vw;
}

.page h1 {
  font-size: 2.2rem;
  margin-bottom: 20px;
}

.page h2 {
  font-size: 1.3rem;
  margin-top: 40px;
  margin-bottom: 12px;
  color: var(--accent-1);
}

.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
}

/* ================= Footer ================= */
.footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 40px 6vw;
  border-top: 1px solid var(--border);
  margin-top: 60px;
}

/* ================= Responsive ================= */
@media (max-width: 640px) {
  .nav {
    padding: 18px 5vw;
  }
  .nav-links {
    gap: 16px;
    font-size: 0.85rem;
  }
  .hero {
    padding: 10vh 6vw 6vh;
  }
}