/* SkyFusionOS Landing Page */

:root {
  --bg-primary: #06060f;
  --bg-secondary: #0e0e1a;
  --bg-card: #12122a;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.12);
  --accent-glow: rgba(0, 212, 255, 0.25);
  --text-primary: #f0f4ff;
  --text-secondary: #8894b0;
  --text-muted: #4a5568;
  --border: rgba(255,255,255,0.07);
  --radius: 12px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  background: rgba(6,6,15,0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
}
.nav-logo span { color: var(--accent); }
.nav-badge {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.3);
  padding: 4px 10px;
  border-radius: 20px;
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,212,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, transparent 70%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, transparent 70%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}
.eyebrow::before, .eyebrow::after {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--accent);
  opacity: 0.6;
}
.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}
.hero h1 .accent { color: var(--accent); }
.hero-sub {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

/* ── CTA FORM ── */
.waitlist-form {
  display: flex;
  gap: 10px;
  max-width: 440px;
  margin: 0 auto 32px;
  flex-wrap: wrap;
  justify-content: center;
}
.waitlist-form input {
  flex: 1;
  min-width: 220px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.waitlist-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.waitlist-form input::placeholder { color: var(--text-muted); }
.waitlist-form button {
  padding: 14px 28px;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}
.waitlist-form button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.waitlist-form button:active { transform: translateY(0); }
.waitlist-note {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.waitlist-note a { color: var(--accent); text-decoration: none; }

/* Form success */
#form-success {
  display: none;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.25);
  border-radius: var(--radius);
  padding: 20px 28px;
  max-width: 440px;
  margin: 0 auto 32px;
}
#form-success.show { display: block; }
#form-success p { color: var(--accent); font-weight: 600; margin-bottom: 4px; }
#form-success small { color: var(--text-secondary); font-size: 0.85rem; }

/* Form error */
#form-error {
  display: none;
  color: #ff6b6b;
  font-size: 0.85rem;
  max-width: 440px;
  margin: -16px auto 24px;
  text-align: center;
}
#form-error.show { display: block; }

/* ── STATS ── */
.stats {
  display: flex;
  gap: 48px;
  justify-content: center;
  margin-top: 80px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}
.stat-value .accent { color: var(--accent); }
.stat-label { font-size: 0.8rem; color: var(--text-secondary); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.08em; }

/* ── SECTIONS ── */
.section {
  padding: 100px 48px;
  max-width: 1100px;
  margin: 0 auto;
}
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-heading {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 56px;
}

/* ── VALUE PROPS ── */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.value-card:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-2px);
}
.value-icon {
  width: 48px; height: 48px;
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
}
.value-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.value-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }

/* ── USE CASES ── */
#usecases {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.usecase-card {
  display: flex;
  gap: 20px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  align-items: flex-start;
}
.usecase-icon {
  width: 44px; height: 44px;
  min-width: 44px;
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}
.usecase-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.usecase-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.55; }

/* ── BOTTOM CTA ── */
#cta {
  text-align: center;
  padding: 100px 48px;
}
#cta .section-heading { margin-bottom: 12px; }
#cta .section-sub { margin-bottom: 40px; }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}
footer a { color: var(--text-muted); text-decoration: none; }
footer a:hover { color: var(--accent); }

/* ── DIVIDER ── */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border), transparent);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  nav { padding: 16px 24px; }
  .section { padding: 72px 24px; }
  #usecases { padding: 72px 24px; }
  #cta { padding: 72px 24px; }
  .value-grid { grid-template-columns: 1fr; }
  .usecases-grid { grid-template-columns: 1fr; }
  .stats { gap: 28px; }
  .stat-value { font-size: 1.6rem; }
  footer { flex-direction: column; gap: 12px; text-align: center; }
  .waitlist-form { flex-direction: column; }
  .waitlist-form input, .waitlist-form button { min-width: unset; width: 100%; }
}

/* ── PRINT / PDF EXPORT ── */
@media print {
  nav, footer, .deck-controls { display: none !important; }
  body { background: #fff !important; color: #111 !important; }
  .deck-container { display: block !important; }
  .slide {
    page-break-after: always;
    break-after: page;
    min-height: 100vh;
    padding: 60px 80px;
    background: #fff !important;
    color: #111 !important;
    border: none !important;
  }
  .speaker-notes { display: none !important; }
  .accent, [style*="color: var(--accent)"] { color: #0077aa !important; }
}