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

/* ---- Design tokens ---- */
:root {
  --bg: #000000;
  --text: #ffffff;
  --accent: #00d2ff;
  --accent2: #0088cc;
  --muted: #888888;
  --surface: #0a0a0a;
  --surface2: #111111;
  --border: #1a1a1a;
  --border-mid: #2a2a2a;
  --cyan-dim: rgba(0, 200, 240, 0.08);
  --cyan-glow: rgba(0, 210, 255, 0.35);
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Rajdhani', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---- Layout ---- */
section {
  padding: 5rem 1.5rem;
}

.container {
  max-width: 960px;
  margin: 0 auto;
}

/* ---- Nav ---- */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
}

.nav-logo {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.nav-logo img {
  height: 52px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

/* ---- Section headings ---- */
.section-label {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

/* ---- Buttons ---- */
.btn-primary {
  display: inline-block;
  padding: 0.85rem 2.5rem;
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: 4px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  box-shadow: 0 0 20px rgba(0, 210, 255, 0.3);
}

.btn-primary:hover {
  background: var(--accent2);
  box-shadow: 0 0 30px rgba(0, 210, 255, 0.5);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer span {
  color: var(--accent);
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .site-nav {
    padding: 16px 20px;
  }

  .site-footer {
    padding: 1.5rem 1.25rem;
  }
}