:root {
  color-scheme: dark;
  --bg: #07111f;
  --surface: rgba(13, 27, 46, 0.82);
  --surface-strong: #10243b;
  --text: #f4f8fc;
  --muted: #a9b8c8;
  --line: rgba(255, 255, 255, 0.1);
  --accent: #52d6c6;
  --accent-2: #79a8ff;
  --warning: #ffd27a;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Tahoma, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(82, 214, 198, 0.16), transparent 30rem),
    radial-gradient(circle at 95% 12%, rgba(121, 168, 255, 0.17), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.85;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 34px 34px;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}

a { color: var(--accent); }
a:hover { color: #90f2e7; }

.skip-link {
  position: fixed;
  inset-inline-start: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.65rem 1rem;
  border-radius: 0.7rem;
  background: var(--text);
  color: var(--bg);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 31, 0.86);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  width: min(1120px, calc(100% - 2rem));
  min-height: 72px;
  margin: auto;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 13px;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px rgba(82, 214, 198, 0.22);
  color: #07111f;
  font-size: 1.25rem;
}

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

.lang-switch {
  display: inline-flex;
  padding: 0.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.lang-switch button {
  min-width: 48px;
  padding: 0.45rem 0.7rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.lang-switch button[aria-pressed="true"] {
  background: var(--text);
  color: var(--bg);
}

.page-shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 4.5rem 0 5rem;
}

.hero {
  max-width: 850px;
  margin-bottom: 2.2rem;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 1rem;
  padding: 0.36rem 0.78rem;
  border: 1px solid rgba(82, 214, 198, 0.3);
  border-radius: 999px;
  background: rgba(82, 214, 198, 0.08);
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 800;
}

h1, h2, h3 { line-height: 1.35; }
h1 { margin: 0 0 1rem; font-size: clamp(2.15rem, 7vw, 4.65rem); letter-spacing: -0.04em; }
h2 { margin: 0 0 0.7rem; font-size: clamp(1.25rem, 3vw, 1.65rem); }
h3 { margin: 1.35rem 0 0.45rem; color: var(--accent); }

.lead { margin: 0; color: #d7e3ee; font-size: clamp(1rem, 2vw, 1.17rem); }

.meta-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.4rem; }
.pill { padding: 0.38rem 0.7rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 0.86rem; }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 245px; gap: 1.2rem; align-items: start; }

.toc {
  position: sticky;
  top: 92px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(13, 27, 46, 0.62);
}
.toc strong { display: block; margin-bottom: 0.65rem; }
.toc a { display: block; padding: 0.28rem 0; color: var(--muted); font-size: 0.9rem; text-decoration: none; }
.toc a:hover { color: var(--accent); }

.content { display: grid; gap: 1rem; }
.card {
  overflow: hidden;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card p, .card li { color: #d5e0ea; }
.card ul, .card ol { padding-inline-start: 1.25rem; }
.card li + li { margin-top: 0.4rem; }

.notice {
  border-inline-start: 4px solid var(--warning);
  background: rgba(255, 210, 122, 0.08);
}
.notice h2 { color: var(--warning); }

.action-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.action-card { display: block; padding: 1.2rem; border: 1px solid var(--line); border-radius: 18px; background: rgba(255, 255, 255, 0.035); color: var(--text); text-decoration: none; }
.action-card:hover { border-color: rgba(82, 214, 198, 0.55); color: var(--text); transform: translateY(-2px); }
.action-card span { display: block; margin-top: 0.25rem; color: var(--muted); font-size: 0.9rem; }

.steps { margin: 1rem 0 0; padding: 0; list-style: none; counter-reset: steps; }
.steps li { position: relative; min-height: 42px; padding-inline-start: 3.2rem; counter-increment: steps; }
.steps li::before { position: absolute; inset-inline-start: 0; top: 0; display: grid; width: 2.25rem; height: 2.25rem; place-items: center; border-radius: 50%; background: rgba(82, 214, 198, 0.15); color: var(--accent); content: counter(steps); font-weight: 900; }
.steps li + li { margin-top: 0.9rem; }

.site-footer { border-top: 1px solid var(--line); color: var(--muted); }
.footer-inner { display: flex; width: min(1120px, calc(100% - 2rem)); margin: auto; padding: 1.6rem 0 2.2rem; align-items: center; justify-content: space-between; gap: 1rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }

[data-lang] { display: none; }
html[data-language="ar"] [data-lang="ar"], html[data-language="en"] [data-lang="en"] { display: revert; }

@media (max-width: 820px) {
  .page-shell { padding-top: 3rem; }
  .layout { grid-template-columns: 1fr; }
  .toc { position: static; order: -1; }
  .action-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .nav { min-height: 64px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-text { display: none; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .card { border-radius: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}