@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@400;500;700;800&display=swap');
:root{
  --bg:#f3f6f4;--card:#ffffff;--ink:#14231f;--mute:#5d6f69;--line:#dfe7e3;
  --pri:#0b6b57;--pri2:#0f8a6f;--priS:#e3f3ee;--gold:#c8962b;--goldS:#fbf1d9;
  --ok:#14915f;--okS:#e0f4ea;--bad:#cf3b45;--badS:#fbe6e8;--warn:#b57400;--warnS:#fdf0d5;
  --r:18px;--sh:0 1px 2px rgba(20,35,31,.05),0 8px 24px rgba(20,35,31,.06);
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0d1714;--card:#14221e;--ink:#e8f1ed;--mute:#93a8a1;--line:#243630;
  --pri:#2fb594;--pri2:#47c9a8;--priS:#163a31;--gold:#e3b04b;--goldS:#3a2f14;
  --ok:#3cc98a;--okS:#123a29;--bad:#ef6a74;--badS:#3d1c20;--warn:#e3b04b;--warnS:#3a2f14;--sh:none}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.85 Tajawal,Tahoma,"Segoe UI",sans-serif}
a{color:var(--pri)}
/* header */
header{display:flex;align-items:center;gap:16px;padding:10px clamp(14px,4vw,32px);background:color-mix(in srgb,var(--card) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5;flex-wrap:wrap}
header[hidden]{display:none}
.brand{font-weight:800;color:var(--pri);text-decoration:none;font-size:20px;display:flex;align-items:center;gap:8px}
.brand::before{content:"";width:12px;height:28px;border-radius:4px;background:linear-gradient(var(--gold) 0 33%,var(--pri) 33% 100%)}
nav{display:flex;gap:4px;flex:1}
nav a{padding:5px 14px;border-radius:99px;color:var(--mute);text-decoration:none;font-weight:500}
nav a:hover{background:var(--priS)}
nav a.on{background:var(--pri);color:#fff}
#who{color:var(--mute);font-size:14px}
main{max-width:1000px;margin:24px auto;padding:0 clamp(14px,4vw,24px) 70px}
/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px 22px;margin-bottom:16px;box-shadow:var(--sh)}
h1{font-size:28px;font-weight:800;margin:.2em 0 .4em}
h2{font-size:21px;font-weight:700;margin:.8em 0 .5em}
h3{font-size:18px;margin:.2em 0 .5em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.sub{cursor:pointer;text-decoration:none;color:inherit;display:block;transition:transform .15s,box-shadow .15s;position:relative;overflow:hidden;margin:0}
.sub:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(11,107,87,.15)}
.sub::before{content:"";position:absolute;inset:0 0 auto 0;height:5px;background:var(--ac,var(--pri))}
.sub .ic{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;font-size:28px;background:color-mix(in srgb,var(--ac,var(--pri)) 14%,transparent);margin-bottom:8px}
.c0{--ac:#0b6b57}.c1{--ac:#c8962b}.c2{--ac:#2b6cb0}.c3{--ac:#8e44ad}.c4{--ac:#d6513f}
/* hero */
.hero small{color:inherit}
.hero{background:linear-gradient(135deg,#0b6b57,#0f8a6f);color:#fff;border:0;display:flex;gap:20px;align-items:center;justify-content:space-between;flex-wrap:wrap;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;left:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.08)}
.hero h1{margin:0;color:#fff}.hero p{margin:.2em 0 0;opacity:.9}
.stats{display:flex;gap:12px;position:relative;z-index:1}
.stat{background:rgba(255,255,255,.16);border-radius:14px;padding:8px 18px;text-align:center;min-width:92px}
.stat b{display:block;font-size:26px;line-height:1.3}.stat small{opacity:.9}
/* controls */
button,.btn{background:var(--pri);color:#fff;border:0;padding:10px 20px;border-radius:12px;font:inherit;font-weight:700;cursor:pointer;text-decoration:none;display:inline-block;transition:filter .15s,transform .1s}
button:hover,.btn:hover{filter:brightness(1.08)}button:active{transform:scale(.98)}
button.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);font-weight:500}
button.ok{background:var(--ok)}button:disabled{opacity:.45;cursor:not-allowed}
.btn.sm{padding:5px 14px;font-size:14px}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
input,textarea,select{font:inherit;padding:11px 14px;border:1.5px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink);width:100%}
input:focus,textarea:focus,select:focus{border-color:var(--pri);outline:0}
textarea{min-height:100px}
.bar{height:9px;background:var(--line);border-radius:9px;overflow:hidden;margin:8px 0 4px}
.bar i{display:block;height:100%;background:var(--ac,var(--ok));border-radius:9px;transition:width .5s}
small{color:var(--mute)}
/* tabs */
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0 16px;padding:6px;background:var(--card);border:1px solid var(--line);border-radius:16px;position:sticky;top:62px;z-index:4}
.tabs button{background:transparent;color:var(--mute);font-weight:500;padding:8px 16px}
.tabs button.on{background:var(--pri);color:#fff}
.pre{white-space:pre-wrap;font-size:17px;line-height:2}
/* tags */
.tag{display:inline-block;padding:1px 12px;border-radius:99px;font-size:13px;background:var(--line);color:var(--mute);font-weight:500}
.tag.ok{background:var(--okS);color:var(--ok)}.tag.bad{background:var(--badS);color:var(--bad)}.tag.warn{background:var(--warnS);color:var(--warn)}
/* task + lesson rows */
.trow{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:12px 0;border-top:1px solid var(--line);text-decoration:none;color:inherit}
.trow:first-of-type{border-top:0}
a.trow:hover{background:var(--priS);margin:0 -12px;padding:12px;border-radius:12px;border-color:transparent}
/* quiz */
.q{border:1px solid var(--line);border-radius:16px;padding:16px 18px;margin:14px 0;background:var(--bg)}
.q>b{display:flex;gap:10px;align-items:flex-start;font-size:17px;margin-bottom:8px}
.qn{flex:none;width:30px;height:30px;border-radius:50%;background:var(--pri);color:#fff;display:grid;place-items:center;font-size:14px}
.opt{display:flex;align-items:center;padding:11px 14px;border:1.5px solid var(--line);border-radius:12px;margin:8px 0;cursor:pointer;background:var(--card);transition:border-color .12s,background .12s}
.opt:hover{border-color:var(--pri)}
.opt:has(input:checked){border-color:var(--pri);background:var(--priS);font-weight:700}
.opt input{width:auto;margin-left:10px;accent-color:var(--pri)}
.fb{margin-top:8px}
.q:has(.fb .tag.ok){border-color:var(--ok)}.q:has(.fb .tag.bad){border-color:var(--bad)}
.big{font-size:56px;font-weight:800;line-height:1.2;color:var(--pri)}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.round{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;margin:10px 0;flex-wrap:wrap}
/* tables */
table{width:100%;border-collapse:collapse}
th,td{text-align:right;padding:10px 8px;border-bottom:1px solid var(--line)}
th{color:var(--mute);font-weight:500;font-size:14px}
.scroll{overflow-x:auto}
/* login */
.login-wrap{min-height:80vh;display:grid;place-items:center}
.login{width:min(420px,100%);padding:32px}
.login h1{text-align:center;color:var(--pri)}
.login .logo{width:70px;height:70px;border-radius:22px;margin:0 auto 10px;display:grid;place-items:center;font-size:36px;background:linear-gradient(135deg,var(--pri),var(--pri2))}
.login label{font-weight:500}.login input{margin:6px 0 16px}.login button{width:100%;padding:12px}
.err{color:var(--bad)}
@media(max-width:640px){h1{font-size:23px}.stats{width:100%}.stat{flex:1}.tabs{top:96px}.pre{font-size:16px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
[hidden]{display:none!important}
button.sm{padding:4px 10px;font-size:13px}
fieldset{border:1px solid var(--line);border-radius:10px;margin:10px 0;padding:10px 14px}
legend{font-weight:700;padding:0 6px}
details{margin:10px 0}

.row input{flex:1;min-width:0}
.tabs button.on,.row button.on{background:var(--accent,#2e9e7e);color:#fff}