:root {
  --bg-main: #f4f8ff;
  --bg-layer:
    radial-gradient(1200px 600px at 80% -10%, #c9ddff 0%, transparent 60%),
    radial-gradient(900px 420px at -10% 20%, #d4ffe9 0%, transparent 55%),
    linear-gradient(180deg, #f7fbff 0%, #eef5ff 100%);
  --ink: #101d31;
  --muted: #4f617f;
  --line: #cedcf2;
  --surface-1: rgba(255, 255, 255, 0.78);
  --surface-2: #ffffff;
  --brand: #165ee9;
  --brand-strong: #0f49ba;
  --brand-soft: #e8f0ff;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-soft: 0 12px 28px rgba(16, 29, 49, 0.08);
  --shadow-hero: 0 28px 56px rgba(18, 48, 98, 0.16);
  --font-ui: 'Plus Jakarta Sans', 'Avenir Next', 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', 'Plus Jakarta Sans', 'Avenir Next', 'Segoe UI', sans-serif;
}

:root[data-theme='dark'] {
  --bg-main: #070f1e;
  --bg-layer:
    radial-gradient(1200px 600px at 85% -15%, #213d72 0%, transparent 60%),
    radial-gradient(900px 420px at -10% 25%, #124142 0%, transparent 55%),
    linear-gradient(180deg, #0a1427 0%, #07101f 100%);
  --ink: #d9e7ff;
  --muted: #a6bbdd;
  --line: #274364;
  --surface-1: rgba(14, 26, 45, 0.8);
  --surface-2: #12233d;
  --brand: #78a8ff;
  --brand-strong: #a7c6ff;
  --brand-soft: #19355d;
  --shadow-soft: 0 14px 36px rgba(0, 0, 0, 0.36);
  --shadow-hero: 0 30px 60px rgba(1, 7, 16, 0.55);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-ui);
  color: var(--ink);
  background: var(--bg-layer);
  background-color: var(--bg-main);
  line-height: 1.58;
}

a {
  color: var(--brand);
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background-image:
    linear-gradient(rgba(60, 95, 154, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(60, 95, 154, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at 50% 35%, black 36%, transparent 100%);
}

:root[data-theme='dark'] .bg-grid {
  background-image:
    linear-gradient(rgba(90, 132, 201, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 132, 201, 0.13) 1px, transparent 1px);
}

.site-header,
main,
.site-footer {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0 0.6rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.012em;
}

.controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.theme-switch,
.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.18rem;
  background: var(--surface-2);
  box-shadow: var(--shadow-soft);
}

.theme-btn,
.lang-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0.34rem 0.68rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
}

.theme-btn[aria-pressed='true'],
.lang-btn[aria-pressed='true'] {
  background: var(--brand-soft);
  color: var(--brand-strong);
}

.hero {
  margin-top: 1.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface-1);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-hero);
  padding: clamp(1.5rem, 4vw, 3.1rem);
}

.eyebrow {
  margin: 0;
  color: var(--brand-strong);
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.76rem;
}

h1,
h2 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  color: var(--ink);
}

h1 {
  margin-top: 0.9rem;
  font-size: clamp(2rem, 4.5vw, 3.7rem);
  line-height: 1.06;
  max-width: 17ch;
}

.hero-copy {
  margin-top: 1rem;
  max-width: 72ch;
  color: var(--muted);
  font-size: clamp(1rem, 1.25vw, 1.2rem);
}

.hero-status {
  margin-top: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--brand-strong);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.42rem 0.78rem;
}

.cta-row {
  margin-top: 1.45rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.72rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.72rem 1.1rem;
  min-width: 140px;
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background-color 160ms ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, #2371ff 0%, #0f53d8 100%);
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(17, 90, 224, 0.36);
}

.btn-secondary {
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1.05rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  box-shadow: var(--shadow-soft);
  padding: 1.15rem;
}

.card h2 {
  font-size: 1.12rem;
}

.card p {
  margin: 0.55rem 0 0;
  color: var(--muted);
}

.faq {
  margin-top: 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  box-shadow: var(--shadow-soft);
  padding: 1.15rem;
}

.faq h2 {
  font-size: 1.28rem;
  margin-bottom: 0.45rem;
}

details {
  border-top: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  padding: 0.72rem 0;
}

details:first-of-type {
  border-top: 0;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

details p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.site-footer {
  color: var(--muted);
  font-size: 0.92rem;
  padding: 1.6rem 0 2rem;
}

.legal-links {
  margin-top: 0.48rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.legal-links a {
  color: var(--brand-strong);
  font-weight: 700;
  text-decoration: none;
}

.legal-links a:hover {
  text-decoration: underline;
}

.legal-hero {
  margin-top: 1.2rem;
}

.legal-block h2 {
  margin-top: 1rem;
  font-size: 1.1rem;
}

.legal-block p {
  margin-top: 0.45rem;
  color: var(--muted);
}

@media (max-width: 960px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.65rem;
    padding-top: 0.95rem;
  }

  .controls {
    flex-wrap: wrap;
  }

  .btn {
    min-width: 0;
  }

  h1 {
    max-width: 100%;
  }
}