:root {
  --bg: #0a0f14;
  --panel: #0b1220;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --faint: #6b7280;
  --accent: #38bdf8;
  --radius: 14px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: Inter, system-ui, sans-serif;
  background:
    radial-gradient(circle at top, rgba(56,189,248,0.06), transparent 45%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  background: rgba(10,15,20,0.7);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.logo {
  font-weight: 700;
  font-size: 18px;
}

nav a {
  margin-left: 22px;
  color: var(--text);
  font-size: 14px;
  opacity: 0.85;
  text-decoration: none;
}

nav a:hover { opacity: 1; }

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

.section {
  padding: 90px 0;
}

.hero h1 {
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  line-height: 1.1;
}

.hero h1 span {
  background: linear-gradient(90deg, #38bdf8, #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  margin-top: 22px;
  max-width: 620px;
  color: var(--muted);
}

.authority {
  margin-top: 12px;
  font-size: 14px;
  color: var(--faint);
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 14px;
}

.btn {
  padding: 13px 26px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  text-decoration: none;
}

.btn:hover { transform: translateY(-1px); }

.primary {
  background: linear-gradient(90deg, #38bdf8, #60a5fa);
  color: #020617;
  box-shadow: 0 10px 30px rgba(56,189,248,0.25);
}

.ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

h2 {
  font-size: 28px;
  margin-bottom: 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
}

.card, .project {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.005));
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover, .project:hover {
  transform: translateY(-4px);
  border-color: rgba(56,189,248,0.3);
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.labs-list {
  list-style: none;
  margin-top: 20px;
}

.labs-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.contact-form {
  max-width: 520px;
  display: grid;
  gap: 14px;
}

input, textarea {
  background: #020617;
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: var(--radius);
  color: var(--text);
}

.site-footer {
  padding: 30px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}