/* ── Reset & variables ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1117;
  --surface:   #1a1d27;
  --accent:    #4f8ef7;
  --accent2:   #7c3aed;
  --text:      #e2e8f0;
  --muted:     #8892a4;
  --radius:    8px;
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* ── Shared ────────────────────────────────────────────────────────────── */
.container { max-width: 900px; margin: 0 auto; padding: 0 1.5rem; }

section { padding: 5rem 0; }

h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
}

/* ── Navbar ────────────────────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: box-shadow var(--transition);
}

#navbar.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.4); }

.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.5px;
}

.nav-links { list-style: none; display: flex; gap: 1.8rem; }

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition);
}

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

/* ── Hero ──────────────────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: radial-gradient(ellipse at 50% 60%, rgba(79,142,247,0.12) 0%, transparent 70%);
  padding-top: 60px;
}

.hero-content { max-width: 640px; padding: 0 1.5rem; }

#hero-name {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--text) 30%, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#hero-tagline {
  margin: 1rem 0 2rem;
  font-size: 1.2rem;
  color: var(--muted);
}

/* ── Button ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 600;
  transition: opacity var(--transition), transform var(--transition);
}

.btn:hover { opacity: 0.88; transform: translateY(-2px); }

/* ── About ─────────────────────────────────────────────────────────────── */
#about { background: var(--surface); }

#about-text { max-width: 680px; color: var(--muted); font-size: 1.05rem; }

/* ── Projects ──────────────────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.4rem;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(79,142,247,0.15);
}

.card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }

.card p { color: var(--muted); font-size: 0.92rem; margin-bottom: 1rem; }

.card-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }

.tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(79,142,247,0.15);
  color: var(--accent);
}

.card-link {
  font-size: 0.9rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.card-link:hover { text-decoration: underline; }

/* ── Skills ────────────────────────────────────────────────────────────── */
#skills { background: var(--surface); }

.skills-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.skills-list li {
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(79,142,247,0.35);
  color: var(--text);
  font-size: 0.9rem;
}

/* ── Contact ───────────────────────────────────────────────────────────── */
#contact p { color: var(--muted); margin-bottom: 1.5rem; }

.contact-links { list-style: none; display: flex; flex-wrap: wrap; gap: 1rem; }

.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.2rem;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  transition: border-color var(--transition), color var(--transition);
}

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

/* ── Footer ────────────────────────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.88rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .nav-links { gap: 1.1rem; }
  h2 { font-size: 1.6rem; }
}