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

:root {
  --navy: #0a0e1a;
  --navy-mid: #111827;
  --charcoal: #1a2236;
  --white: #f8f9fb;
  --white-pure: #ffffff;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --accent: #22d3a5;
  --accent-dim: rgba(34, 211, 165, 0.12);
  --accent-glow: rgba(34, 211, 165, 0.25);
  --border: rgba(255, 255, 255, 0.08);
  --border-light: #e2e8f0;
  --font-display: 'Instrument Sans', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--navy);
}

img, svg {
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-light {
  background: var(--white-pure);
  color: var(--text-dark);
}

.section-dark {
  background: var(--navy-mid);
  color: var(--white);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-lead {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 560px;
  margin-bottom: 2.5rem;
}

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}

.logo-dot {
  color: var(--accent);
}

.header-badge {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.35rem 0.75rem;
  border-radius: 100px;
  border: 1px solid rgba(34, 211, 165, 0.2);
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 7rem 0 5rem;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-eyebrow {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: clamp(1.0625rem, 2.5vw, 1.25rem);
  color: var(--text-light);
  line-height: 1.65;
  max-width: 580px;
  margin-bottom: 2.5rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-bottom: 2rem;
}

.hero-trust {
  font-size: 0.875rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.hero-glow {
  position: absolute;
  top: 20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.5;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

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

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--accent);
  color: var(--navy);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #1eb892;
  border-color: #1eb892;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.05);
}

.section-light .btn-secondary {
  color: var(--text-dark);
  border-color: var(--border-light);
}

.section-light .btn-secondary:hover {
  border-color: var(--text-muted);
  background: var(--white);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* ── Cards ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: rgba(34, 211, 165, 0.35);
  box-shadow: 0 8px 32px rgba(15, 23, 42, 0.06);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border-radius: 10px;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.card p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── Use Cases ── */
.use-cases-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
  margin-top: 2rem;
}

.use-case {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--white);
  transition: background var(--transition), border-color var(--transition);
}

.use-case:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(34, 211, 165, 0.2);
}

.use-case-subtle {
  opacity: 0.75;
}

.use-case-dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}

/* ── .app Advantage ── */
.app-advantage-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 768px) {
  .app-advantage-inner {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.app-advantage-content p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  max-width: 540px;
}

.advantage-list {
  list-style: none;
  margin-top: 1.5rem;
}

.advantage-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.625rem;
  font-size: 0.9375rem;
  color: var(--text-dark);
  font-weight: 500;
}

.advantage-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.app-advantage-visual {
  display: flex;
  justify-content: center;
}

.domain-display {
  background: var(--navy);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  text-align: center;
  width: 100%;
  max-width: 360px;
}

.domain-name {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.03em;
}

.domain-tld {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
}

/* ── Domain Value ── */
.value-inner {
  max-width: 720px;
}

.value-copy {
  font-size: 1.125rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.value-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.tag {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(34, 211, 165, 0.2);
  padding: 0.4rem 0.875rem;
  border-radius: 100px;
}

/* ── Purchase ── */
.section-purchase {
  background: linear-gradient(180deg, var(--charcoal) 0%, var(--navy) 100%);
  color: var(--white);
  text-align: center;
  padding: 6rem 0;
}

.purchase-inner {
  max-width: 560px;
}

.purchase-copy {
  font-size: 1.125rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.purchase-copy strong {
  color: var(--white);
  font-weight: 600;
}

.purchase-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.875rem;
  margin-bottom: 1.5rem;
}

.purchase-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ── Footer ── */
.site-footer {
  background: var(--navy);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  text-align: center;
}

.footer-domain {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.footer-disclaimer {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.footer-contact a {
  font-size: 0.875rem;
  color: var(--accent);
  transition: opacity var(--transition);
}

.footer-contact a:hover {
  opacity: 0.8;
}

/* ── Animations ── */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children in grids */
.cards-grid .fade-in:nth-child(2) { transition-delay: 0.08s; }
.cards-grid .fade-in:nth-child(3) { transition-delay: 0.16s; }
.cards-grid .fade-in:nth-child(4) { transition-delay: 0.24s; }

.use-cases-list .fade-in:nth-child(2) { transition-delay: 0.05s; }
.use-cases-list .fade-in:nth-child(3) { transition-delay: 0.1s; }
.use-cases-list .fade-in:nth-child(4) { transition-delay: 0.15s; }
.use-cases-list .fade-in:nth-child(5) { transition-delay: 0.2s; }
.use-cases-list .fade-in:nth-child(6) { transition-delay: 0.25s; }
.use-cases-list .fade-in:nth-child(7) { transition-delay: 0.3s; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .section {
    padding: 3.5rem 0;
  }

  .hero-cta,
  .purchase-cta {
    flex-direction: column;
  }

  .hero-cta .btn,
  .purchase-cta .btn {
    width: 100%;
  }

  .header-badge {
    font-size: 0.6875rem;
    padding: 0.3rem 0.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  html {
    scroll-behavior: auto;
  }

  .btn:hover {
    transform: none;
  }
}