:root {
  color-scheme: dark;
  --bg: #070b18;
  --surface: rgba(20, 27, 48, 0.78);
  --surface-strong: #151d33;
  --line: rgba(181, 193, 225, 0.16);
  --text: #f6f7fb;
  --muted: #b7bfd3;
  --accent: #8b7cff;
  --accent-strong: #a89cff;
  --aqua: #62e6d0;
  --max: 1120px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 14% 4%, rgba(98, 230, 208, 0.13), transparent 28rem),
    radial-gradient(circle at 88% 10%, rgba(139, 124, 255, 0.2), transparent 30rem),
    var(--bg);
  line-height: 1.65;
}

a { color: var(--accent-strong); }
a:hover { color: var(--aqua); }

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -5rem;
  z-index: 10;
  padding: 0.7rem 1rem;
  color: #070b18;
  background: var(--aqua);
  border-radius: 0.65rem;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 11, 24, 0.86);
  backdrop-filter: blur(18px);
}

.nav {
  max-width: var(--max);
  min-height: 4.5rem;
  margin: auto;
  padding: 0.7rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 760;
  text-decoration: none;
}

.brand img {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 0.7rem;
  box-shadow: 0 8px 26px rgba(139, 124, 255, 0.24);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: inline-block;
  padding: 0.52rem 0.72rem;
  color: var(--muted);
  border-radius: 0.65rem;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
}

main, .footer-inner {
  width: min(calc(100% - 2.5rem), var(--max));
  margin-inline: auto;
}

.hero {
  min-height: 36rem;
  padding: 7rem 0 5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(16rem, 0.8fr);
  align-items: center;
  gap: 4rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--aqua);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.15; text-wrap: balance; }
h1 { margin: 0; font-size: clamp(2.7rem, 7vw, 5.4rem); letter-spacing: -0.055em; }
h2 { margin: 0 0 1rem; font-size: clamp(1.7rem, 4vw, 2.65rem); letter-spacing: -0.035em; }
h3 { margin: 0 0 0.65rem; font-size: 1.15rem; }

.lead {
  max-width: 43rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero-mark {
  justify-self: center;
  width: min(100%, 21rem);
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 3.2rem;
  background: linear-gradient(145deg, rgba(139, 124, 255, 0.2), rgba(98, 230, 208, 0.08));
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.38);
  transform: rotate(2deg);
}

.hero-mark img {
  display: block;
  width: 100%;
  border-radius: 2.25rem;
}

.actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.7rem 1.1rem;
  color: #0b1020;
  background: var(--aqua);
  border: 1px solid transparent;
  border-radius: 0.8rem;
  font-weight: 760;
  text-decoration: none;
}

.button:hover { color: #0b1020; background: #93f4e4; }
.button.secondary { color: var(--text); background: transparent; border-color: var(--line); }
.button.secondary:hover { background: rgba(255,255,255,0.07); }

.section { padding: 5rem 0; border-top: 1px solid var(--line); }
.section-intro { max-width: 46rem; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2rem; }
.card {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: var(--surface);
}
.card p, .card li { color: var(--muted); }
.card p:last-child { margin-bottom: 0; }
.card-icon { color: var(--aqua); font-size: 1.3rem; }

.page-header { max-width: 50rem; padding: 6rem 0 3rem; }
.page-header h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
.prose { max-width: 51rem; padding-bottom: 6rem; }
.prose section { padding: 2.1rem 0; border-top: 1px solid var(--line); }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--text); }
.prose code { color: var(--aqua); }
.notice {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border-inline-start: 3px solid var(--aqua);
  background: rgba(98, 230, 208, 0.07);
  border-radius: 0.25rem 0.8rem 0.8rem 0.25rem;
}

.site-footer { border-top: 1px solid var(--line); background: rgba(0, 0, 0, 0.16); }
.footer-inner {
  padding: 2.5rem 0;
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-inner p { margin: 0; }

[dir="rtl"] body { font-family: "Noto Sans Arabic", Tahoma, Arial, sans-serif; }
[dir="rtl"] h1, [dir="rtl"] h2 { letter-spacing: 0; }
[dir="rtl"] .notice { border-radius: 0.8rem 0.25rem 0.25rem 0.8rem; }

@media (max-width: 760px) {
  .nav { align-items: flex-start; }
  .nav-links { flex-wrap: wrap; }
  .hero { grid-template-columns: 1fr; padding-top: 4.5rem; gap: 2.5rem; }
  .hero-mark { width: 15rem; }
  .grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
}

@media (max-width: 520px) {
  .nav { display: block; }
  .nav-links { margin-top: 0.65rem; justify-content: flex-start; }
  .nav-links a { padding-inline: 0.5rem; }
}

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