:root {
  color-scheme: light;
  --bg: #0b1220;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-2: rgba(255, 255, 255, 0.08);
  --text: #eaf0ff;
  --muted: rgba(234, 240, 255, 0.75);
  --border: rgba(234, 240, 255, 0.14);
  --accent: #7dd3fc;
  --accent-2: #a78bfa;
  --shadow: 0 10px 35px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --max: 980px;
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Tahoma, Arial, "Noto Sans Arabic",
    "Noto Naskh Arabic", sans-serif;
  line-height: 1.85;
  background: radial-gradient(1200px 600px at 15% 10%, rgba(167, 139, 250, 0.22), transparent 55%),
    radial-gradient(900px 500px at 85% 0%, rgba(125, 211, 252, 0.18), transparent 60%),
    var(--bg);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.95em;
  padding: 0.12rem 0.45rem;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
  border-radius: 999px;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 18px 40px;
}

.skip-link {
  position: absolute;
  inset-inline-start: 12px;
  top: 12px;
  padding: 10px 14px;
  border-radius: 999px;
  background: #ffffff;
  color: #0b1220;
  transform: translateY(-160%);
  transition: transform 160ms ease;
  z-index: 50;
}

.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid rgba(125, 211, 252, 0.65);
  outline-offset: 3px;
}

.site-header {
  padding: 26px 0 8px;
}

.header-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.05));
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 6px);
  box-shadow: var(--shadow);
  padding: 26px 22px;
  position: relative;
  overflow: hidden;
}

.header-card::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: radial-gradient(700px 240px at 30% 0%, rgba(125, 211, 252, 0.18), transparent 70%),
    radial-gradient(700px 240px at 80% 0%, rgba(167, 139, 250, 0.14), transparent 70%);
  pointer-events: none;
}

.header-card > * {
  position: relative;
  z-index: 1;
}

.kicker {
  margin: 0 0 6px;
  color: var(--muted);
  letter-spacing: 0.2px;
  font-weight: 600;
}

.title {
  margin: 0 0 10px;
  line-height: 1.25;
  font-size: clamp(1.35rem, 3vw, 2.05rem);
}

.meta {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.98rem;
}

.meta-label {
  font-weight: 600;
}

.lead {
  margin: 0.4rem 0;
  color: rgba(234, 240, 255, 0.92);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 18px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
  margin: 14px 0;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  letter-spacing: 0.1px;
}

h3 {
  margin: 18px 0 10px;
  font-size: 1.07rem;
  color: rgba(234, 240, 255, 0.95);
}

p {
  margin: 0.55rem 0;
  color: rgba(234, 240, 255, 0.92);
}

ul,
ol {
  margin: 0.65rem 0;
  padding-inline-start: 1.2rem;
}

li {
  margin: 0.35rem 0;
  color: rgba(234, 240, 255, 0.92);
}

blockquote {
  margin: 14px 0 6px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(125, 211, 252, 0.25);
  background: rgba(125, 211, 252, 0.08);
}

blockquote p {
  margin: 0;
  color: rgba(234, 240, 255, 0.95);
}

.toc h2 {
  margin-bottom: 10px;
}

.toc-list {
  margin: 0;
  padding-inline-start: 1.25rem;
  display: grid;
  gap: 6px;
}

.toc-list a {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(234, 240, 255, 0.10);
  text-decoration: none;
}

.toc-list a:hover {
  border-color: rgba(125, 211, 252, 0.4);
  background: rgba(125, 211, 252, 0.08);
}

.site-footer {
  margin-top: 18px;
  padding: 14px 4px 0;
  color: var(--muted);
}

.footer-note {
  margin: 0;
  font-size: 0.95rem;
  opacity: 0.9;
}

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