:root {
  --bg: #0a0f18;
  --bg-alt: #10192a;
  --card: rgba(255,255,255,0.06);
  --card-border: rgba(255,255,255,0.12);
  --text: #e8eefc;
  --muted: #a9b5d1;
  --accent: #5eead4;
  --accent-2: #60a5fa;
  --shadow: 0 20px 60px rgba(0,0,0,0.35);
  --radius: 16px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(96,165,250,0.18), transparent 30%),
    radial-gradient(circle at top right, rgba(94,234,212,0.14), transparent 26%),
    linear-gradient(180deg, #07101c 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.5;
}

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

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

/* Accessibility: skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  background: var(--accent);
  color: #05111c;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 700;
  z-index: 1000;
}

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

/* Accessibility: visible focus states */
a:focus-visible,
.btn:focus-visible,
.lang-switch a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* ---------- Header / hero (mobile base) ---------- */

.hero {
  padding: 2rem 0 1.5rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1rem;
}

.site-logo {
  display: block;
  flex-shrink: 0;
}

.site-logo img {
  display: block;
  height: 40px;
  width: auto;
}

.lang-switch {
  display: flex;
  gap: 0.5rem;
}

.lang-switch a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  min-width: 44px;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  background: rgba(255,255,255,0.05);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.lang-switch a[aria-current="page"] {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #05111c;
  border-color: transparent;
}

.hero-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
  align-items: stretch;
}

.brand,
.hero-card,
.card,
.product,
.contact-box {
  border: 1px solid var(--card-border);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}

.brand {
  padding: 1.25rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  color: var(--accent);
}

h1, h2, h3, p {
  margin-top: 0;
}

h3 {
  font-size: 1.33rem;
}

h1 {
  font-size: 1.7rem;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.lead {
  font-size: 1rem;
  color: var(--muted);
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

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

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #05111c;
}

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

.hero-card {
  padding: 1.5rem;
}

.hero-card h2 {
  margin-bottom: 1rem;
  font-size: 1.33rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.8rem;
  color: var(--muted);
}

.contact-list dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.contact-list dd {
  margin: 0;
  color: var(--text);
  font-weight: 700;
}

.contact-list div {
  display: grid;
  gap: 0.15rem;
}

.mini-note {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--card-border);
  color: var(--muted);
}

/* ---------- Sections (mobile base) ---------- */

.section {
  padding: 2.5rem 0;
}

.alt {
  background: rgba(255,255,255,0.02);
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2 {
  font-size: 1.4rem;
  margin-bottom: 0;
}

.card-grid,
.product-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.card,
.product {
  padding: 1.4rem;
}

.card p,
.product p,
.contact-box p {
  color: var(--muted);
}

.contact-section {
  padding-top: 1rem;
}

.contact-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.4rem;
}

.footer {
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.footer-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid var(--card-border);
  padding-top: 1rem;
}

/* ---------- min-width: 640px ---------- */

@media (min-width: 640px) {
  :root {
    --radius: 20px;
  }

  .hero {
    padding: 4rem 0 2rem;
  }

  .site-logo img {
    height: 60px;
  }

  .brand {
    padding: 2rem;
  }

  h1 {
    font-size: 1.95rem;
  }

  .section-heading h2 {
    font-size: 1.55rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .contact-box {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 1.6rem;
  }

  .footer-grid {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ---------- min-width: 900px ---------- */

@media (min-width: 900px) {
  .site-logo img {
    height: 84px;
  }

  h1 {
    font-size: 2.37rem;
  }

  .section-heading h2 {
    font-size: 1.78rem;
  }

  .hero-grid {
    grid-template-columns: 1.6fr 0.9fr;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- Reduced motion ---------- */

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