:root {
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #f59e0b;
  --card: #334155;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Navigation */
#navbar {
  position: fixed;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--accent);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

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

.tagline {
  font-size: 1.25rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #0f172a;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
}

/* Sections */
.section {
  padding: 5rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.section p {
  max-width: 700px;
  margin: 0 auto 1.5rem;
  text-align: center;
  color: var(--muted);
}

.alt-bg {
  background: var(--bg-alt);
  width: 100%;
  max-width: none;
}

.alt-bg .section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

/* Skills */
.skills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.skill {
  background: var(--card);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
}

/* Projects */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background: var(--card);
  border-radius: 10px;
  padding: 1.5rem;
  transition: transform 0.2s;
}

.project-card:hover {
  transform: translateY(-4px);
}

.project-img {
  height: 140px;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1rem;
}

.project-card h3 {
  margin-bottom: 0.5rem;
}

.project-card p {
  text-align: left;
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.project-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 640px) {
  .nav-links {
    gap: 1rem;
  }
  .hero h1 {
    font-size: 2.25rem;
  }
}