:root{
  --bg:#071214;
  --bg2:#0b1b1e;
  --card:#0f2427;
  --card2:#132e32;
  --line:#1f4146;
  --text:#e8f4f3;
  --muted:#93b3b1;
  --accent:#2dd4bf;
  --accent2:#14b8a6;
  --accent-ink:#04201d;
  --ok:#22c55e;
  --ok-bg:rgba(34,197,94,.12);
  --bad:#ef4444;
  --bad-bg:rgba(239,68,68,.12);
  --warn:#f59e0b;
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{min-height:100%}
body{
  font-family:"Tajawal",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(45,212,191,.16), transparent 60%),
    radial-gradient(700px 400px at -10% 110%, rgba(20,184,166,.10), transparent 60%),
    var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-tap-highlight-color:transparent;
}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
a{color:var(--accent)}
.wrap{max-width:860px;margin:0 auto;padding:20px 16px 60px}

/* ---------- top bar ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px}
.brand{display:flex;align-items:center;gap:10px}
.logo{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:var(--accent-ink);font-weight:800;font-size:20px;
  box-shadow:0 8px 24px rgba(45,212,191,.25)}
.brand h1{font-size:19px;font-weight:800;line-height:1.2}
.brand small{display:block;color:var(--muted);font-size:12px;font-weight:500}
.chip{border:1px solid var(--line);background:var(--card);padding:7px 14px;border-radius:999px;font-size:14px;color:var(--muted)}
.chip:hover{color:var(--text);border-color:var(--accent2)}

/* ---------- cards & buttons ---------- */
.card{background:linear-gradient(180deg,var(--card),var(--bg2));border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:14px;font-weight:700;font-size:16px;transition:transform .12s, filter .12s}
.btn:active{transform:scale(.98)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:var(--accent-ink);box-shadow:0 10px 28px rgba(45,212,191,.22)}
.btn-primary:hover{filter:brightness(1.07)}
.btn-ghost{border:1px solid var(--line);background:var(--card)}
.btn-ghost:hover{border-color:var(--accent2)}
.btn-block{width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.back{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:15px;margin-bottom:14px}
.back:hover{color:var(--accent)}

/* ---------- login ---------- */
.hero{min-height:calc(100vh - 40px);display:flex;align-items:center;justify-content:center}
.login{width:100%;max-width:440px;text-align:center;padding:32px 24px}
.login .logo{width:70px;height:70px;font-size:32px;border-radius:20px;margin:0 auto 16px}
.login h2{font-size:30px;font-weight:800;margin-bottom:4px}
.login .sub{color:var(--muted);margin-bottom:6px}
.teacher-tag{display:inline-block;margin:6px 0 24px;padding:6px 14px;border-radius:999px;background:rgba(45,212,191,.1);color:var(--accent);font-size:14px;font-weight:700}
.field{text-align:right;margin-bottom:14px}
.field label{display:block;font-size:14px;color:var(--muted);margin-bottom:6px}
.input{width:100%;padding:14px 16px;border-radius:14px;border:1px solid var(--line);background:var(--bg);outline:none;font-size:16px}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(45,212,191,.15)}
.input[dir=ltr]{text-align:left}
.link{display:inline-block;margin-top:18px;color:var(--muted);font-size:14px;text-decoration:underline;text-underline-offset:4px}
.link:hover{color:var(--accent)}
.err{color:var(--bad);font-size:14px;min-height:20px;margin-top:8px}

/* ---------- home ---------- */
.hello{margin-bottom:18px}
.hello h2{font-size:26px;font-weight:800}
.hello p{color:var(--muted)}
.grid{display:grid;gap:14px}
.unit{display:flex;align-items:center;gap:16px;text-align:right;width:100%;transition:border-color .15s, transform .15s}
.unit:hover{border-color:var(--accent2);transform:translateY(-2px)}
.unit .ic{flex:0 0 58px;height:58px;border-radius:16px;display:grid;place-items:center;font-size:28px;background:var(--card2);border:1px solid var(--line)}
.unit .t small{color:var(--accent);font-weight:700;font-size:13px}
.unit .t h3{font-size:20px;font-weight:800;line-height:1.35}
.unit .t p{color:var(--muted);font-size:14px}
.unit .arrow{margin-inline-start:auto;color:var(--muted);font-size:22px}
.progress-pill{font-size:12px;color:var(--muted);background:var(--bg);border:1px solid var(--line);padding:2px 10px;border-radius:999px;display:inline-block;margin-top:4px}

/* ---------- unit / lessons ---------- */
.section-title{font-size:15px;color:var(--accent);font-weight:800;margin:22px 0 10px}
.lesson{display:flex;align-items:center;gap:14px;text-align:right;width:100%;padding:16px 18px}
.lesson:hover{border-color:var(--accent2)}
.lesson .n{flex:0 0 38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--card2);color:var(--accent);font-weight:800}
.lesson h4{font-size:17px;font-weight:700}
.lesson .meta{font-size:13px;color:var(--muted)}
.best{margin-inline-start:auto;font-size:13px;font-weight:800;padding:4px 10px;border-radius:999px;white-space:nowrap}
.best.good{background:var(--ok-bg);color:var(--ok)}
.best.mid{background:rgba(245,158,11,.12);color:var(--warn)}
.best.low{background:var(--bad-bg);color:var(--bad)}

/* ---------- lesson summary ---------- */
.page-head h2{font-size:26px;font-weight:800;line-height:1.35}
.page-head p{color:var(--muted);margin-bottom:16px}
.sum-card{margin-bottom:14px}
.sum-card h3{font-size:18px;font-weight:800;color:var(--accent);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.sum-card h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
.sum-card ul{list-style:none;display:grid;gap:8px}
.sum-card li{position:relative;padding-right:18px;color:#d3e7e5}
.sum-card li::before{content:"•";position:absolute;right:2px;color:var(--accent2);font-weight:800}
.sticky-cta{position:sticky;bottom:12px;margin-top:20px}

/* ---------- quiz ---------- */
.q{margin-bottom:14px}
.q .qn{font-size:13px;color:var(--accent);font-weight:800;margin-bottom:4px}
.q .qt{font-size:18px;font-weight:700;margin-bottom:12px;line-height:1.6}
.opts{display:grid;gap:8px}
.opt{display:flex;align-items:center;gap:12px;width:100%;text-align:right;padding:12px 14px;border-radius:14px;border:1px solid var(--line);background:var(--bg);transition:border-color .12s, background .12s}
.opt:hover{border-color:var(--accent2)}
.opt .l{flex:0 0 30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--card2);font-weight:800;color:var(--muted)}
.opt.sel{border-color:var(--accent);background:rgba(45,212,191,.09)}
.opt.sel .l{background:var(--accent);color:var(--accent-ink)}
.q.missing{border-color:var(--bad)}
.alert{border-radius:14px;padding:12px 16px;font-weight:700;margin:12px 0}
.alert.bad{background:var(--bad-bg);color:#fca5a5;border:1px solid rgba(239,68,68,.4)}
.alert.warn{background:rgba(245,158,11,.1);color:#fcd34d;border:1px solid rgba(245,158,11,.35)}
.alert.ok{background:var(--ok-bg);color:#86efac;border:1px solid rgba(34,197,94,.35)}
.qprogress{position:sticky;top:0;z-index:5;background:rgba(7,18,20,.92);backdrop-filter:blur(6px);padding:10px 0;margin-bottom:10px}
.bar{height:8px;border-radius:99px;background:var(--card2);overflow:hidden}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent2),var(--accent));border-radius:99px;transition:width .2s}
.qprogress small{display:block;color:var(--muted);font-size:13px;margin-top:4px}

/* ---------- result ---------- */
.result-head{text-align:center;padding:28px 20px}
.result-head .who{color:var(--muted)}
.result-head .lt{font-size:20px;font-weight:800;margin:2px 0 14px}
.big{font-size:68px;font-weight:800;line-height:1;background:linear-gradient(135deg,var(--accent),#a7f3d0);-webkit-background-clip:text;background-clip:text;color:transparent}
.big.low{background:linear-gradient(135deg,#f87171,#fca5a5);-webkit-background-clip:text;background-clip:text}
.msg{margin-top:8px;font-weight:700}
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0}
.tile{text-align:center;padding:14px 8px;border-radius:14px;background:var(--bg);border:1px solid var(--line)}
.tile b{display:block;font-size:26px;font-weight:800}
.tile span{font-size:13px;color:var(--muted)}
.tile.ok b{color:var(--ok)} .tile.bad b{color:var(--bad)}
.review{border-radius:14px;padding:14px 16px;margin-bottom:10px;border:1px solid}
.review.ok{background:var(--ok-bg);border-color:rgba(34,197,94,.35)}
.review.bad{background:var(--bad-bg);border-color:rgba(239,68,68,.35)}
.review .qt{font-weight:700;margin-bottom:6px}
.review .ans{font-size:15px}
.review .ans.right{color:#86efac;font-weight:700}
.review .ans.wrong{color:#fca5a5;text-decoration:line-through}
.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}

/* ---------- teacher ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.stat{text-align:center;padding:16px 8px}
.stat b{display:block;font-size:30px;font-weight:800;color:var(--accent)}
.stat span{color:var(--muted);font-size:14px}
.toolbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.toolbar .input{flex:1 1 200px;padding:10px 14px}
select.input{appearance:none;color:var(--text);background:var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2393b3b1' stroke-width='2' fill='none'/%3E%3C/svg%3E") no-repeat left 14px center;padding-left:34px}
select.input option{background:var(--bg2);color:var(--text)}
.student{margin-bottom:10px;padding:0;overflow:hidden}
.student summary{list-style:none;display:flex;align-items:center;gap:12px;padding:14px 16px;cursor:pointer}
.student summary::-webkit-details-marker{display:none}
.student .av{flex:0 0 40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--card2);color:var(--accent);font-weight:800}
.student .nm{font-weight:800}
.student .sm{font-size:13px;color:var(--muted)}
.attempts{border-top:1px solid var(--line);padding:6px 16px 12px}
.att{display:flex;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px}
.att:last-child{border-bottom:0}
.att .d{color:var(--muted);font-size:12px}
.empty{text-align:center;color:var(--muted);padding:30px}
.foot{text-align:center;color:var(--muted);font-size:12px;margin-top:30px}

@media (max-width:520px){
  .brand h1{font-size:17px}
  .big{font-size:56px}
  .actions{grid-template-columns:1fr}
  .stat b{font-size:24px}
  .q .qt{font-size:17px}
}