:root{--bg:#f6f8fa;--card:#fff;--ink:#1d2a33;--mut:#5b6b76;--line:#e2e8ee;--pri:#0f766e;--pri2:#115e59;--acc:#c2410c;--red:#b91c1c;--blue:#1d4ed8;--r:14px;--sh:0 1px 3px rgba(0,0,0,.06),0 4px 14px rgba(0,0,0,.05)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Noto Naskh Arabic","Segoe UI",Tahoma,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--ink);line-height:1.85;font-size:17px}
[lang=fr],[dir=ltr]{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--pri2)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #f59e0b;outline-offset:2px;border-radius:6px}
.wrap{max-width:980px;margin:0 auto;padding:0 16px}
.skip{position:absolute;right:-999px}.skip:focus{right:8px;top:8px;background:#fff;padding:8px;z-index:99}
.topbar{position:sticky;top:0;z-index:50;background:var(--pri);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.bar{display:flex;align-items:center;justify-content:space-between;min-height:56px;gap:8px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none}.brand b{display:block;font-size:17px;line-height:1.2}.brand small{display:block;font-size:12px;opacity:.85}
.logo{width:34px;height:34px;border-radius:10px;background:#fff;color:var(--pri);display:grid;place-items:center;font-size:20px}
.menu-btn{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;border-radius:10px;font-size:20px;width:44px;height:40px}
.nav{display:none;background:var(--pri2)}.nav.open{display:block}
.nav ul{list-style:none;margin:0;padding:6px 16px 10px;display:flex;flex-direction:column;gap:2px}
.nav a{display:block;color:#fff;text-decoration:none;padding:9px 10px;border-radius:10px}.nav a:hover,.nav a[aria-current]{background:rgba(255,255,255,.14)}
.nav small{opacity:.8;font-size:12px;margin-inline-start:6px}
@media(min-width:860px){.menu-btn{display:none}.nav{display:block}.nav ul{flex-direction:row;flex-wrap:wrap;padding:4px 16px 8px}.nav a{padding:6px 10px;font-size:15px}}
main{padding:18px 0 30px}
h1{font-size:26px;line-height:1.4;margin:6px 0 4px}h2{font-size:21px;line-height:1.45}h3{font-size:19px;color:var(--pri2);margin:22px 0 6px;border-bottom:2px solid #d5ece9;padding-bottom:3px}h4{font-size:17px;margin:16px 0 4px;color:#7c2d12}
.fr{color:var(--mut);font-size:15px;direction:ltr;display:inline-block}
.lead{color:var(--mut)}
.crumbs{font-size:14px;color:var(--mut);margin-bottom:6px}.crumbs a{color:var(--mut)}
.hero{background:linear-gradient(135deg,#0f766e,#134e4a);color:#fff;border-radius:var(--r);padding:22px 18px;margin:6px 0 18px;box-shadow:var(--sh)}
.hero h1{margin:0 0 6px}.hero p{margin:4px 0;opacity:.95}
.grid{display:grid;gap:12px;grid-template-columns:1fr}@media(min-width:640px){.grid{grid-template-columns:1fr 1fr}}@media(min-width:900px){.grid.g3{grid-template-columns:1fr 1fr 1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--sh)}
a.card{display:block;text-decoration:none;color:inherit}a.card:hover{border-color:var(--pri)}
.card .ic{font-size:30px}.card h2,.card h3{margin:4px 0;border:0;color:var(--ink);font-size:19px}.card p{margin:4px 0;color:var(--mut);font-size:15px}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}
.chip{display:inline-block;border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 12px;font-size:14px;text-decoration:none;color:var(--ink);cursor:pointer}
.chip[aria-pressed=true],.chip.on{background:var(--pri);border-color:var(--pri);color:#fff}
details.topic{background:var(--card);border:1px solid var(--line);border-radius:var(--r);margin:10px 0;box-shadow:var(--sh);overflow:hidden}
details.topic>summary{list-style:none;cursor:pointer;padding:14px 16px;display:flex;gap:10px;align-items:flex-start}
details.topic>summary::-webkit-details-marker{display:none}
details.topic>summary .n{flex:0 0 32px;height:32px;border-radius:9px;background:#e6f4f2;color:var(--pri2);display:grid;place-items:center;font-weight:700}
details.topic>summary .t{flex:1}details.topic>summary .t b{display:block;font-size:18px;line-height:1.5}
details.topic>summary .chev{transition:transform .2s;color:var(--mut)}details.topic[open]>summary .chev{transform:rotate(180deg)}
.tbody{padding:0 16px 14px;border-top:1px solid var(--line)}
.tbody ul{padding-inline-start:20px;margin:6px 0}.tbody li{margin:3px 0}
.tbody p{margin:8px 0}
.box{display:flex;gap:10px;border-radius:12px;padding:10px 12px;margin:10px 0;border:1px solid}
.box .bi{flex:0 0 auto;font-size:20px;line-height:1.6}
.box.tip{background:#eff6ff;border-color:#bfdbfe}.box.warn{background:#fff7ed;border-color:#fed7aa}.box.nurse{background:#ecfdf5;border-color:#a7f3d0}.box.key{background:#fef2f2;border-color:#fecaca}.box.home{background:#fefce8;border-color:#fde68a}
.box.key::before{content:""}
.tw{overflow-x:auto;margin:8px 0;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;min-width:480px;font-size:15px;background:#fff}
th,td{border:1px solid var(--line);padding:7px 8px;vertical-align:top;text-align:start}th{background:#f0f7f6}
.quizlink{display:inline-block;margin-top:8px;background:var(--pri);color:#fff;text-decoration:none;border-radius:10px;padding:8px 14px}
/* 3D viewer */
.viewer{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden;margin:12px 0}
.vhead{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;gap:8px;flex-wrap:wrap}
.vhead h2{margin:0;font-size:18px}
.stage{position:relative;height:58vh;min-height:320px;max-height:560px;background:radial-gradient(circle at 50% 40%,#ffffff,#dfe8ec)}
model-viewer{direction:ltr;width:100%;height:100%;--poster-color:transparent;--progress-bar-color:#0f766e}
.vload{position:absolute;inset:0;display:grid;place-items:center;color:var(--mut);font-size:15px;text-align:center;padding:20px;pointer-events:none}
.hs{width:26px;height:26px;border-radius:50%;border:2px solid #fff;background:rgba(15,118,110,.92);color:#fff;font:700 12px/22px system-ui;box-shadow:0 1px 4px rgba(0,0,0,.4);cursor:pointer;padding:0;text-align:center}
.hs{opacity:1!important}
.hs.on{background:#c2410c;transform:scale(1.25)}
.hs .lbl{display:none;position:absolute;bottom:30px;left:50%;transform:translateX(-50%);background:#111827;color:#fff;font:600 12px/1.4 system-ui;white-space:nowrap;padding:3px 7px;border-radius:7px}
.hs.on .lbl,.showlabels .hs .lbl{display:block}
.vtools{display:flex;gap:6px;flex-wrap:wrap;padding:8px 12px;border-top:1px solid var(--line);background:#fafcfc}
.btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:7px 12px;font:inherit;font-size:14px;cursor:pointer;color:var(--ink)}
.btn.on{background:var(--pri);color:#fff;border-color:var(--pri)}
.vinfo{padding:10px 14px;border-top:1px solid var(--line);min-height:54px}
.vinfo b{font-size:17px}.vinfo .fr{margin-inline-start:6px}
.legend{list-style:none;margin:0;padding:6px 10px 12px;display:grid;grid-template-columns:1fr;gap:4px}
@media(min-width:640px){.legend{grid-template-columns:1fr 1fr}}
.legend button{width:100%;text-align:start;border:1px solid var(--line);background:#fff;border-radius:10px;padding:6px 8px;font:inherit;font-size:14.5px;cursor:pointer;display:flex;gap:8px;align-items:center}
.legend button.on{border-color:var(--acc);background:#fff7ed}
.legend .num{flex:0 0 24px;height:24px;border-radius:50%;background:var(--pri);color:#fff;display:grid;place-items:center;font:700 12px system-ui}
.legend .fr{font-size:13px}
.hint{font-size:13px;color:var(--mut);padding:0 14px 10px}
/* quiz */
.qbar{display:flex;justify-content:space-between;align-items:center;font-size:14px;color:var(--mut);margin:8px 0}
.prog{height:8px;background:#e5ecef;border-radius:99px;overflow:hidden}.prog i{display:block;height:100%;background:var(--pri);width:0}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--sh);margin:10px 0}
.qtopic{font-size:13px;color:var(--pri2);background:#e6f4f2;border-radius:99px;padding:2px 10px;display:inline-block}
.qq{font-size:18px;margin:10px 0 12px;line-height:1.8}
.opt{display:flex;gap:10px;width:100%;text-align:start;border:2px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;margin:8px 0;font:inherit;font-size:16px;cursor:pointer;align-items:flex-start;color:var(--ink)}
.opt .l{flex:0 0 28px;height:28px;border-radius:8px;background:#eef2f4;display:grid;place-items:center;font:700 15px system-ui}
.opt.ok{border-color:#16a34a;background:#f0fdf4}.opt.ok .l{background:#16a34a;color:#fff}
.opt.bad{border-color:#dc2626;background:#fef2f2}.opt.bad .l{background:#dc2626;color:#fff}
.opt:disabled{cursor:default}
.expl{border-radius:12px;padding:10px 12px;margin-top:10px;background:#f0f9ff;border:1px solid #bae6fd}
.expl.w{background:#fff7ed;border-color:#fed7aa}
.qnav{display:flex;gap:8px;justify-content:space-between;margin-top:12px}
.btn.pri{background:var(--pri);border-color:var(--pri);color:#fff}
.score{text-align:center;font-size:20px}
.ad-slot{margin:18px 0}
.foot{background:#0b3b38;color:#cfe7e4;padding:18px 0;font-size:14px;margin-top:30px}.foot a{color:#fff}.foot .small,.small{font-size:13px;opacity:.9}
.prose{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--sh)}
.toc a{white-space:nowrap}
.need{display:flex;gap:10px}.need .n{flex:0 0 34px;height:34px;border-radius:10px;background:#e6f4f2;color:var(--pri2);display:grid;place-items:center;font-weight:700}
@media(max-width:400px){body{font-size:16px}h1{font-size:23px}}
.weak{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;box-shadow:var(--sh);margin:16px 0}
.weak h2{margin:0 0 4px;font-size:19px}.weak h2 small{font-size:14px;color:var(--mut);font-weight:400}
.weak .wempty{margin:6px 0}.weak .wnote{color:var(--mut);margin:4px 0}
.wlist{list-style:none;padding:0;margin:8px 0}
.wlist li{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:7px 0;border-top:1px solid var(--line)}
.wlist li a{min-width:0;overflow-wrap:anywhere}
.wcount{flex:0 0 auto;background:#fef2f2;border:1px solid #fecaca;color:var(--red);border-radius:999px;padding:0 10px;font-size:13px;font-weight:700;white-space:nowrap}
.wact{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.wact .btn{text-decoration:none;display:inline-block}
.wtag{margin:6px 0 0;color:var(--pri2)}