:root {
  --bg: #f2f5ec; --surface: #ffffff; --ink: #17261c; --muted: #4e5f53;
  --grass: #2f7d32; --dirt: #8a5a2b; --line: #d5dccb; --focus: #1b5e20;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111a14; --surface: #18241c; --ink: #e8f0e4; --muted: #a3b3a7;
          --grass: #7ccf6b; --dirt: #c9965c; --line: #2b3b30; --focus: #b6f0a8; }
}
* { box-sizing: border-box; }
html { color-scheme: light dark; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.9;
  font: 17px/1.9 "Segoe UI", Tahoma, "Noto Sans Arabic", system-ui, sans-serif; }
a { color: var(--grass); text-underline-offset: 4px; }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 2px; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
header { padding: 18px 0; border-bottom: 1px solid var(--line); }
header .wrap { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.brand { font-weight: 800; font-size: 1.2rem; color: var(--ink); text-decoration: none; letter-spacing: .02em; }
nav a { margin-inline-start: 18px; color: var(--muted); }
/* the one memorable thing: a block-terrain strip under the hero */
.hero { padding: 72px 0 40px; }
.hero h1 { font-size: clamp(2.6rem, 11vw, 4.8rem); line-height: 1.15; margin: 0 0 16px; font-weight: 900; }
.hero p { font-size: 1.15rem; color: var(--muted); max-width: 34em; margin: 0; }
.terrain { height: 40px; margin: 40px 0 0; border-block: 4px solid var(--grass);
  background:
    linear-gradient(90deg, var(--dirt) 0 50%, transparent 50%) 0 0 / 80px 20px repeat-x,
    linear-gradient(90deg, transparent 0 25%, var(--dirt) 25% 75%, transparent 75%) 0 20px / 80px 20px repeat-x;
  opacity: .9; }
main section { padding: 28px 0; border-bottom: 1px solid var(--line); }
h2 { font-size: 1.4rem; margin: 0 0 8px; }
h3 { font-size: 1.1rem; margin: 22px 0 4px; }
p, li { color: var(--ink); max-width: 38em; }
ul { padding-inline-start: 22px; }
.note { background: var(--surface); border: 1px solid var(--line); border-inline-start: 5px solid var(--grass);
  padding: 14px 18px; margin: 16px 0; max-width: 38em; }
footer { padding: 28px 0 48px; color: var(--muted); font-size: .95rem; }
@media (max-width: 480px) { nav a { margin-inline-start: 12px; } .hero { padding-top: 48px; } }