:root{
  --navy:#13203b; --navy-2:#1c2f55; --gold:#c9a84c; --gold-soft:#e3cd8f;
  --cream:#faf7f0; --ink:#26303f; --muted:#647089; --line:#e7e0d2;
  --shadow:0 10px 30px rgba(19,32,59,.08); --shadow-lg:0 18px 50px rgba(19,32,59,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Tajawal',system-ui,sans-serif;background:var(--cream);color:var(--ink);line-height:1.8;font-size:17px;-webkit-font-smoothing:antialiased}
.wrap{max-width:960px;margin:0 auto;padding:0 1.4rem}
header{position:relative;color:var(--cream);padding:4.2rem 1.4rem 3.4rem;
  background:radial-gradient(1200px 500px at 80% -10%,rgba(201,168,76,.22),transparent 60%),linear-gradient(135deg,var(--navy),var(--navy-2));
  border-bottom:4px solid var(--gold)}
header .wrap{text-align:center}
header h1{font-family:'Playfair Display',serif;color:#fff;font-size:clamp(2.1rem,5.5vw,3.4rem);line-height:1.1;margin-bottom:.7rem;letter-spacing:.01em}
header h1 .accent{color:var(--gold)}
header p{opacity:.92;font-size:1.08rem;max-width:660px;margin:0 auto}
.badge{display:inline-block;margin-top:1.2rem;background:rgba(201,168,76,.16);color:var(--gold-soft);
  border:1px solid rgba(201,168,76,.5);font-weight:700;font-size:.78rem;padding:.4rem 1rem;border-radius:999px;letter-spacing:.06em}
.langbar{position:absolute;top:1.1rem;right:1.4rem;display:flex;gap:.45rem;z-index:6}
.langbar button{background:rgba(255,255,255,.1);color:var(--cream);border:1px solid rgba(255,255,255,.25);
  padding:.38rem .85rem;border-radius:8px;cursor:pointer;font-family:inherit;font-size:.85rem;transition:.18s}
.langbar button:hover{background:rgba(255,255,255,.2)}
.langbar button.active{background:var(--gold);color:var(--navy);border-color:var(--gold);font-weight:700}
section{padding:3rem 0;border-bottom:1px solid var(--line)}
h2{font-family:'Playfair Display',serif;color:var(--navy);font-size:clamp(1.5rem,3.5vw,2rem);margin-bottom:1.1rem;display:flex;align-items:center;gap:.7rem}
h2 .num{display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;border-radius:50%;
  background:var(--navy);color:var(--gold);font-family:'Tajawal';font-weight:700;font-size:.95rem;flex:none}
h3{color:var(--navy);font-size:1.2rem;margin:1.5rem 0 .5rem;font-weight:700}
p{margin-bottom:.95rem}
ul,ol{margin:0 0 1rem 1.5rem}
li{margin-bottom:.45rem}
a{color:var(--navy)}
.objectives{background:#fff;border:1px solid var(--line);border-right:4px solid var(--gold);border-radius:14px;padding:1.6rem 1.8rem;margin:1.8rem 0;box-shadow:var(--shadow)}
.objectives h3{margin-top:0;color:var(--navy)}
.callout{background:#fff;border-right:4px solid var(--navy);border-radius:10px;padding:1.2rem 1.4rem;margin:1.3rem 0;box-shadow:var(--shadow)}
.warn{background:#fdf6e3;border-right:4px solid #e0a800}
.saudi{background:#eef3fd;border-right:4px solid var(--navy)}
table{width:100%;border-collapse:collapse;margin:1.3rem 0;font-size:.95rem;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
th,td{padding:.9rem 1.1rem;text-align:right;border-bottom:1px solid var(--line)}
th{background:var(--navy);color:var(--cream);font-weight:600;font-size:.9rem;letter-spacing:.02em}
tr:last-child td{border-bottom:none}
tbody tr:nth-child(even){background:#fbf9f4}
.statgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1.1rem;margin:1.5rem 0}
.stat{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:var(--cream);border-radius:12px;padding:1.3rem;text-align:center;box-shadow:var(--shadow)}
.stat b{display:block;font-family:'Playfair Display',serif;color:var(--gold);font-size:2rem;line-height:1}
.stat span{font-size:.82rem;opacity:.85}
.diagram{background:linear-gradient(160deg,#0e1830,#16223c);border-radius:12px;padding:1.6rem;margin:1.4rem 0;text-align:center;box-shadow:var(--shadow)}
.diagram svg{width:min(420px,100%);height:auto}
.legend{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin-top:.9rem}
.legend span{background:rgba(201,168,76,.14);color:var(--gold-soft);font-size:.76rem;padding:.3rem .75rem;border-radius:999px;border:1px solid rgba(201,168,76,.35)}
.quiz{background:#fff;border:1px solid var(--line);border-radius:14px;padding:1.8rem;margin:1.5rem 0;box-shadow:var(--shadow)}
.q{margin-bottom:1.4rem}
.q p{font-weight:700;color:var(--navy);margin-bottom:.5rem}
.opt{display:block;padding:.7rem 1rem;border:1px solid var(--line);border-radius:9px;margin-bottom:.45rem;cursor:pointer;transition:.15s;background:#fff}
.opt:hover{background:#f6f2e8;border-color:var(--gold)}
.opt.correct{background:#e8f6ec;border-color:#2e9e54;color:#1c6b38}
.opt.wrong{background:#fdeaea;border-color:#e0584f;color:#a0231c}
.quizbtn{background:linear-gradient(135deg,var(--gold),#b9963f);color:var(--navy);border:none;padding:.75rem 1.7rem;border-radius:9px;font-weight:700;font-family:inherit;cursor:pointer;font-size:1rem;box-shadow:var(--shadow)}
.score{margin-top:1rem;font-weight:700;color:var(--navy);font-size:1.05rem}
.glossary dt{font-weight:700;color:var(--navy);font-size:1.05rem}
.glossary dd{margin:0 0 .9rem 1.3rem;color:var(--muted)}
.cta{background:radial-gradient(800px 400px at 50% -20%,rgba(201,168,76,.18),transparent),linear-gradient(135deg,var(--navy),var(--navy-2));
  color:var(--cream);border-radius:16px;padding:2.4rem;text-align:center;margin:2.2rem 0;box-shadow:var(--shadow-lg);border:1px solid rgba(201,168,76,.25)}
.cta h3{color:var(--gold);margin-top:0;font-family:'Playfair Display',serif;font-size:1.5rem}
.cta p{max-width:560px;margin:.6rem auto 0;opacity:.92}
.cta a{display:inline-block;background:linear-gradient(135deg,var(--gold),#b9963f);color:var(--navy);font-weight:800;text-decoration:none;
  padding:.9rem 2rem;border-radius:10px;margin-top:1.1rem;font-size:1.08rem;box-shadow:0 8px 24px rgba(201,168,76,.35);transition:.18s}
.cta a:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(201,168,76,.5)}
footer{text-align:center;padding:2.2rem 1rem;font-size:.82rem;color:var(--muted);border-top:1px solid var(--line);background:#f4efe4}
.en,.ar{display:none}
body.lang-en .en{display:block}
body.lang-ar .ar{display:block}
body.lang-ar{direction:rtl;font-family:'Tajawal',sans-serif}
body.lang-ar h1,body.lang-ar h2,body.lang-ar .stat b{font-family:'Tajawal',serif}
.ar{font-size:1.05rem;line-height:1.9}
.flag{font-size:1.05rem;margin-inline-end:.25rem}