/* ===== STRATAOS LANDING — Design System ===== */

:root {
  --bg:        #0A0E14;
  --surface:   #12171F;
  --border:    #1E2730;
  --teal:      #00C9A7;
  --teal-dim:  #00C9A720;
  --steel:     #8A9BB5;
  --white:     #FFFFFF;
  --text:      #C8D4E3;
  --text-dim:  #5A6A80;
  --font:      -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Typography ---- */
h1, h2, h3, h4 { color: var(--white); font-weight: 700; line-height: 1.2; }
p { color: var(--text); }

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Layout ---- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

section { padding: 80px 0; }

/* ---- Nav ---- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}
.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav-logo span { color: var(--teal); }
.nav-contact {
  font-size: 0.85rem;
  color: var(--text-dim);
}
.nav-contact a { color: var(--steel); }

/* ---- Hero ---- */
.hero {
  padding: 100px 0 80px;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  background: var(--teal-dim);
  color: var(--teal);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 28px;
  border: 1px solid var(--teal);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--white);
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--steel);
  max-width: 580px;
  margin: 0 auto 40px;
}
.hero-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ---- Segments ---- */
.segments {
  padding: 64px 0;
}
.segments-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.segment-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  position: relative;
  overflow: hidden;
}
.segment-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--teal);
  opacity: 0;
  transition: opacity 0.3s;
}
.segment-card:hover::before { opacity: 1; }
.segment-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
}
.segment-card h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--white);
}
.segment-card p {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 20px;
}
.segment-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--steel);
  background: var(--border);
  padding: 4px 10px;
  border-radius: 4px;
}

/* ---- Divider ---- */
.divider-section {
  padding: 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.divider-inner {
  display: flex;
  align-items: center;
  gap: 48px;
  padding: 40px 0;
  flex-wrap: wrap;
}
.divider-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.divider-logo span { color: var(--teal); }
.divider-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}
.divider-tagline {
  font-size: 0.85rem;
  color: var(--steel);
  white-space: nowrap;
}

/* ---- Engagement Models ---- */
.models {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 10px;
}
.section-heading {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 8px;
}
.section-sub {
  font-size: 0.95rem;
  color: var(--steel);
  margin-bottom: 48px;
}
.models-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.model-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 24px;
  transition: border-color 0.3s;
}
.model-card:hover { border-color: var(--teal); }
.model-num {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 16px;
}
.model-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.model-card p {
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.6;
}

/* ---- Stats ---- */
.stats {
  background: var(--bg);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.stat-block {
  background: var(--surface);
  padding: 36px 24px;
  text-align: center;
}
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-num sup {
  font-size: 1.1rem;
  vertical-align: super;
}
.stat-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--steel);
  letter-spacing: 0.04em;
}

/* ---- Contact ---- */
.contact {
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
.contact-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px 20px;
  text-align: center;
}
.contact-icon {
  font-size: 1.4rem;
  margin-bottom: 10px;
}
.contact-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.contact-value {
  font-size: 0.9rem;
  color: var(--white);
  font-weight: 500;
}
.contact-value a { color: var(--teal); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--text-dim);
}
.footer-links {
  display: flex;
  gap: 20px;
  font-size: 0.8rem;
}
.footer-links a { color: var(--steel); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  section { padding: 56px 0; }
  .segments-grid { grid-template-columns: 1fr; }
  .models-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 56px; }
  .divider-inner { flex-direction: column; gap: 16px; align-items: flex-start; }
  .divider-line { display: none; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
}