/*
  Arkyt AI marketing site — matches frontend/theme.py tokens.
  Edit the :root block below to change colours site-wide.
*/

:root {
  --arkyt-ink: #080d16;
  --arkyt-muted: #505561;
  --arkyt-line: #dddde5;
  --arkyt-panel: rgba(255, 255, 255, 0.88);
  --arkyt-accent: #00d5b2;
  --arkyt-accent-deep: #5c82da;
  --arkyt-accent-soft: #c3f0e3;
  --arkyt-lavender: #e8e9ff;
  --arkyt-mint: #cdf6e3;
  --arkyt-background: #fafafd;
  --arkyt-secondary: #f1f1f8;
  --arkyt-success: #00a88c;
  --arkyt-radius: 12px;
  --arkyt-font-display: "Syne", "Plus Jakarta Sans", sans-serif;
  --arkyt-font-body: "Plus Jakarta Sans", system-ui, sans-serif;
  --container: min(1120px, calc(100vw - 2rem));
  --shadow-soft: 0 18px 50px rgba(8, 13, 22, 0.08);
  --shadow-card: 0 10px 30px rgba(8, 13, 22, 0.06);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--arkyt-font-body);
  color: var(--arkyt-ink);
  overflow-x: clip;
  background:
    radial-gradient(1100px 560px at 6% -12%, rgba(232, 233, 255, 0.95), transparent 58%),
    radial-gradient(900px 520px at 100% -8%, rgba(205, 246, 227, 0.85), transparent 52%),
    linear-gradient(180deg, var(--arkyt-background) 0%, #f7f7fb 55%, #fafafd 100%);
  min-height: 100vh;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

.container {
  width: var(--container);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--arkyt-ink);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 9999;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  overflow: visible;
  backdrop-filter: blur(12px);
  background: rgba(250, 250, 253, 0.82);
  border-bottom: 1px solid rgba(221, 221, 229, 0.7);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.9rem 0;
  min-width: 0;
}

.brand {
  flex: 0 0 auto;
  overflow: visible;
  text-decoration: none;
}

.brand-wordmark {
  display: inline-block;
  font-family: var(--arkyt-font-display);
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: -0.03em;
  line-height: 1;
  white-space: nowrap;
}

.brand-ink {
  color: var(--arkyt-ink);
}

.brand-mint {
  color: var(--arkyt-accent);
}

.btn-label-short {
  display: none;
}

.site-nav {
  flex: 0 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem 1.25rem;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--arkyt-muted);
  transition: color 160ms ease;
}

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

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.92rem;
  line-height: 1;
  padding: 0.72rem 1rem;
  border: 1px solid transparent;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

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

.btn-primary {
  background: var(--arkyt-ink);
  color: #fff;
  border-color: var(--arkyt-ink);
  box-shadow: 0 1px 2px rgba(8, 13, 22, 0.08);
}

.btn-primary:hover {
  background: var(--arkyt-accent);
  border-color: var(--arkyt-accent);
  color: #043f37;
  box-shadow: 0 0 0 3px rgba(0, 213, 178, 0.22);
}

.btn-secondary {
  background: var(--arkyt-panel);
  color: var(--arkyt-ink);
  border-color: var(--arkyt-line);
}

.btn-secondary:hover {
  border-color: var(--arkyt-accent);
  box-shadow: 0 0 0 3px rgba(0, 213, 178, 0.14);
}

.btn-lg {
  padding: 0.9rem 1.25rem;
  font-size: 0.98rem;
}

/* Hero */

.hero {
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(3rem, 7vw, 5.5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--arkyt-accent-deep);
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--arkyt-font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 800;
}

.hero h1 .accent {
  color: var(--arkyt-accent);
}

.lead {
  margin: 0 0 1.5rem;
  max-width: 34rem;
  font-size: clamp(1rem, 2vw, 1.12rem);
  line-height: 1.55;
  color: var(--arkyt-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hero-note {
  margin: 0;
  font-size: 0.82rem;
  color: var(--arkyt-muted);
}

/* Hero visual — single card; no absolute layers (mobile-safe) */

.hero-visual {
  width: 100%;
  max-width: 420px;
  margin-inline: auto;
}

.visual-card-front {
  border-radius: calc(var(--arkyt-radius) + 4px);
  border: 1px solid var(--arkyt-line);
  background: var(--arkyt-panel);
  box-shadow: var(--shadow-soft);
  padding: 1.25rem;
}

.visual-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--arkyt-accent-deep);
  margin-bottom: 0.85rem;
}

.grain-preview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.grain-preview span {
  aspect-ratio: 1;
  border-radius: 8px;
  background: linear-gradient(135deg, #5c82da, #00d5b2);
  opacity: 0.85;
}

.grain-preview span:nth-child(2) { background: linear-gradient(135deg, #7b93e8, #4fd9c0); }
.grain-preview span:nth-child(3) { background: linear-gradient(135deg, #9aadee, #7ee5d0); }
.grain-preview span:nth-child(4) { background: linear-gradient(135deg, #c3d0f5, #a8f0e0); }
.grain-preview span:nth-child(5) { background: linear-gradient(135deg, #4fd9c0, #00a88c); }
.grain-preview span:nth-child(6) { background: linear-gradient(135deg, #00d5b2, #5c82da); }
.grain-preview span:nth-child(7) { background: linear-gradient(135deg, #7ee5d0, #9aadee); }
.grain-preview span:nth-child(8) { background: linear-gradient(135deg, #a8f0e0, #c3f0e3); }
.grain-preview span:nth-child(9) { background: linear-gradient(135deg, #00a88c, #00d5b2); }
.grain-preview span:nth-child(10) { background: linear-gradient(135deg, #5c82da, #7b93e8); }
.grain-preview span:nth-child(11) { background: linear-gradient(135deg, #4fd9c0, #a8f0e0); }
.grain-preview span:nth-child(12) { background: linear-gradient(135deg, #cdf6e3, #e8e9ff); }

.panel-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.panel-chip {
  padding: 0.45rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--arkyt-ink);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--arkyt-line);
  box-shadow: var(--shadow-card);
  white-space: nowrap;
}

/* Features */

.features {
  padding: 0 0 clamp(3rem, 7vw, 5rem);
}

.section-head {
  margin-bottom: 1.75rem;
}

.section-head h2 {
  margin: 0 0 0.5rem;
  font-family: var(--arkyt-font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--arkyt-muted);
  font-size: 1rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature-card {
  background: var(--arkyt-panel);
  border: 1px solid var(--arkyt-line);
  border-radius: var(--arkyt-radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}

.feature-icon {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 0.72rem;
  font-weight: 800;
  color: #043f37;
  background: rgba(0, 213, 178, 0.18);
  border: 1px solid rgba(0, 213, 178, 0.35);
  margin-bottom: 0.85rem;
}

.feature-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  color: var(--arkyt-muted);
  font-size: 0.94rem;
  line-height: 1.55;
}

/* CTA band */

.cta-band {
  padding: 0 0 clamp(3rem, 7vw, 4.5rem);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border-radius: calc(var(--arkyt-radius) + 2px);
  border: 1px solid rgba(0, 213, 178, 0.28);
  background: linear-gradient(135deg, rgba(0, 213, 178, 0.12), rgba(92, 130, 218, 0.1));
}

.cta-inner h2 {
  margin: 0 0 0.35rem;
  font-family: var(--arkyt-font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
}

.cta-inner p {
  margin: 0;
  color: var(--arkyt-muted);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--arkyt-line);
  padding: 1.25rem 0 2rem;
  background: rgba(255, 255, 255, 0.45);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}

.footer-brand {
  margin: 0;
  font-family: var(--arkyt-font-display);
  font-weight: 800;
}

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

.footer-copy {
  margin: 0;
  font-size: 0.82rem;
  color: var(--arkyt-muted);
}

/* Responsive */

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .hero-visual {
    max-width: 100%;
  }

  .grain-preview {
    grid-template-columns: repeat(3, 1fr);
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  :root {
    --container: calc(100vw - 1.25rem);
  }

  .nav-link {
    display: none;
  }

  .header-inner {
    padding: 0.75rem 0;
  }

  .brand-wordmark {
    font-size: 1rem;
  }

  .btn-label-full {
    display: none;
  }

  .btn-label-short {
    display: inline;
  }

  .site-nav .btn {
    padding: 0.55rem 0.75rem;
    font-size: 0.82rem;
  }

  .hero {
    padding-top: 1.75rem;
    padding-bottom: 2.5rem;
  }

  .hero-visual {
    margin-top: 0.25rem;
  }

  .visual-card-front {
    padding: 0.85rem;
  }

  .grain-preview {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.3rem;
  }

  .panel-chip {
    font-size: 0.68rem;
    padding: 0.35rem 0.55rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-lg {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn:hover {
    transform: none;
  }
}