/* ARSAS shared product-site design system.
   This file contains only cross-page tokens and reusable component treatment.
   Homepage composition belongs in home.css. */

:root {
  --site-section-space: clamp(4.8rem, 6.2vw, 6rem);
  --site-section-space-tight: clamp(3.3rem, 4.5vw, 4.25rem);
  --site-card-radius: 20px;
  --site-surface-border: rgba(190, 221, 255, .135);
  --site-surface-border-hover: rgba(117, 207, 255, .25);
  --site-divider: rgba(177, 214, 255, .09);
}

.section {
  position: relative;
  padding-block: var(--site-section-space);
}

.section-tight {
  padding-block: var(--site-section-space-tight);
}

.section + .section::before,
.section + .section-tight::before,
.section-tight + .section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: min(1180px, calc(100% - 2rem));
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, var(--site-divider) 18%, rgba(107, 199, 255, .15) 50%, var(--site-divider) 82%, transparent);
  pointer-events: none;
}

.section-head {
  max-width: 800px;
  margin-bottom: clamp(2rem, 3vw, 2.6rem);
}

.section-head h2 {
  max-width: 18ch;
  text-wrap: balance;
}

.section-head.center h2 {
  margin-inline: auto;
}

.section-head p {
  max-width: 68ch;
  text-wrap: pretty;
}

.kicker {
  display: inline-flex;
  align-items: center;
  min-height: 1.55rem;
  letter-spacing: .085em;
}

.card,
.panel,
.comparison-panel {
  border-color: var(--site-surface-border);
  background:
    radial-gradient(circle at 12% 0%, rgba(75, 173, 255, .055), transparent 15rem),
    linear-gradient(180deg, rgba(17, 36, 61, .72), rgba(8, 22, 42, .59));
  box-shadow:
    0 14px 40px rgba(0, 8, 24, .12),
    inset 0 1px 0 rgba(255,255,255,.03);
}

.card {
  padding: clamp(1.45rem, 2vw, 1.7rem);
  border-radius: var(--site-card-radius);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease, background .18s ease;
}

.card:hover {
  border-color: var(--site-surface-border-hover);
  background:
    radial-gradient(circle at 12% 0%, rgba(76, 188, 255, .085), transparent 16rem),
    linear-gradient(180deg, rgba(20, 43, 72, .77), rgba(9, 25, 46, .63));
  box-shadow:
    0 20px 50px rgba(0, 8, 25, .18),
    inset 0 1px 0 rgba(255,255,255,.045);
  transform: translateY(-2px);
}

.card h3 {
  margin-bottom: .55rem;
  line-height: 1.22;
  text-wrap: balance;
}

.card p,
.card li,
.panel p,
.comparison-panel p,
.comparison-panel li {
  text-wrap: pretty;
}

.card:focus-within,
.panel:focus-within,
.comparison-panel:focus-within {
  border-color: rgba(101, 203, 255, .31);
  box-shadow:
    0 18px 46px rgba(0, 8, 25, .17),
    0 0 0 3px rgba(78, 183, 255, .075),
    inset 0 1px 0 rgba(255,255,255,.04);
}

.metric-grid {
  overflow: hidden;
  border-color: rgba(188, 221, 255, .12);
  background: linear-gradient(180deg, rgba(255,255,255,.047), rgba(255,255,255,.028));
  box-shadow: 0 16px 42px rgba(0, 8, 24, .13), inset 0 1px 0 rgba(255,255,255,.025);
}

.metric {
  padding: 1.35rem 1.5rem;
  border-color: rgba(190, 222, 255, .085);
}

.metric strong {
  line-height: 1.28;
}

.metric span {
  margin-top: .28rem;
  max-width: 28ch;
}

.callout {
  border-color: rgba(105, 203, 255, .21);
  border-radius: 24px;
  background:
    radial-gradient(circle at 10% 0%, rgba(56,189,248,.145), transparent 21rem),
    radial-gradient(circle at 92% 92%, rgba(139,92,246,.09), transparent 22rem),
    linear-gradient(135deg, rgba(27, 73, 133, .13), rgba(67, 43, 118, .075));
  box-shadow: 0 24px 62px rgba(0, 8, 25, .21), inset 0 1px 0 rgba(255,255,255,.028);
}

.site-footer {
  margin-top: clamp(3.4rem, 5vw, 4.2rem);
  padding-top: 3.25rem;
  border-top-color: rgba(196, 224, 255, .105);
}

.footer-grid {
  align-items: start;
  row-gap: 2.15rem;
}

.footer-title {
  margin-bottom: .72rem;
}

.footer-links a {
  text-underline-offset: .18em;
}

@media (max-width: 980px) {
  :root {
    --site-section-space: clamp(4.2rem, 8vw, 5.2rem);
    --site-section-space-tight: clamp(3rem, 6vw, 3.8rem);
  }

  .section-head h2 {
    max-width: 22ch;
  }
}

@media (max-width: 760px) {
  :root {
    --site-section-space: 4.15rem;
    --site-section-space-tight: 3.15rem;
  }

  .section + .section::before,
  .section + .section-tight::before,
  .section-tight + .section::before {
    width: calc(100% - 2rem);
  }

  .section-head {
    margin-bottom: 1.9rem;
  }

  .section-head h2 {
    max-width: none;
  }

  .card {
    padding: 1.4rem;
    border-radius: 18px;
  }

  .card:hover {
    transform: none;
  }

  .callout {
    border-radius: 20px;
  }

  .site-footer {
    margin-top: 3rem;
    padding-top: 3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .card {
    transition: none;
  }

  .card:hover {
    transform: none;
  }
}