:root {
  --bg: #0b1020;
  --text: #eaf0ff;
  --muted: #adc0e8;
  --primary: #6d8dff;
  --primary-strong: #5b7aff;
  --card: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 8px 30px rgba(2, 6, 23, 0.35);
}

* { box-sizing: border-box; }

html,
body {
  margin: 0;
  padding: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #1a2550 0%, var(--bg) 45%);
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.hero { padding: 1.5rem 0 2rem; }

.hero-content { padding-top: 2rem; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #baccff;
  font-weight: 600;
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.1;
  margin: 0.8rem 0 1rem;
  max-width: 900px;
}

.intro {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.1rem;
}

.tab-shell {
  border: 1px solid var(--border);
  background: rgba(8, 14, 31, 0.72);
  border-radius: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 3rem;
  overflow: hidden;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.tab {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: #d8e4ff;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
}

.tab:hover { background: rgba(255, 255, 255, 0.08); }

.tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.tab-panel {
  padding: 2rem;
  display: none;
}

.tab-panel.active { display: block; }

.section-header h2 {
  margin: 0 0 0.6rem;
  font-size: 1.8rem;
}

.section-header p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  max-width: 800px;
}

.cards {
  display: grid;
  gap: 1rem;
}

.cards.two { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.cards.three { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.card h3 { margin: 0 0 0.5rem; }
.card p { margin: 0; color: var(--muted); }

.card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  display: grid;
  gap: 0.35rem;
}

a {
  color: #c4d3ff;
  text-decoration: none;
}

a:hover { color: #fff; }

.project a {
  display: inline-block;
  margin-top: 0.85rem;
  font-weight: 600;
}

@media (max-width: 640px) {
  .tab-panel { padding: 1.25rem; }
}