:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent: #22d3ee;
  --accent-rgb: 34, 211, 238;
  --font-sans: 'DM Sans', sans-serif;
  --font-mono: 'Space Mono', monospace;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.mono {
  font-family: var(--font-mono);
}

html {
  scroll-behavior: smooth;
}

/* Nav */
.nav-logo {
  color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
}

/* Hero */
.hero-overlay {
  background: linear-gradient(135deg, rgba(15,23,42,0.92), rgba(30,58,138,0.85));
}

.hero-name {
  color: #ffffff;
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.2;
}

.hero-title {
  color: var(--accent);
  font-weight: 400;
  font-size: 1.125rem;
}

.hero-desc {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 1rem;
}

/* About */
.about-title {
  color: var(--accent);
  font-weight: 700;
  font-size: 1.5rem;
}

.about-text {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
}

/* Dark sections */
.section-dark {
  background: var(--bg-secondary);
}

/* Skills */
.skills-title {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.5rem;
}

.skill-card {
  background: var(--bg-primary);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.skill-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(var(--accent-rgb), 0.15);
}

.skill-text {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 1rem;
}

/* Experience */
.exp-title {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.5rem;
}

.exp-date {
  color: var(--accent);
  font-weight: 400;
  font-size: 0.9rem;
}

.exp-role {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.1rem;
  margin-top: 0.25rem;
}

.exp-desc {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 1rem;
  margin-top: 0.25rem;
}

/* Contact */
.contact-title {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.5rem;
}

.contact-desc {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 1rem;
}

.contact-btn {
  background: var(--accent);
  color: var(--bg-primary);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease;
}

.contact-btn:hover {
  transform: scale(1.05);
  background: #0ea5e9;
}

/* Footer */
.footer-text {
  color: #64748b;
  font-weight: 400;
  font-size: 0.875rem;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .hero-name {
    font-size: 1.75rem;
  }
}