/* =====================================================================
 *  מסע המתמטיקה — עיצוב (בקו העיצובי של oded ai)
 * ===================================================================== */
:root{
  --bg1:#0b1020; --bg2:#131a32; --card:#161e38; --card2:#1b2444;
  --line:#273254; --ink:#eef2ff; --muted:#94a3c4;
  --p1:#6366f1; --p2:#8b5cf6; --p3:#22d3ee;
  --ok:#22c55e; --bad:#ef4444; --warn:#f59e0b;
  --shadow:0 20px 50px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Rubik","Segoe UI",Arial,system-ui,-apple-system,sans-serif;
  color:var(--ink); direction:rtl; min-height:100vh;
  background:
    radial-gradient(1100px 600px at 85% -10%, rgba(139,92,246,.22), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(34,211,238,.14), transparent 55%),
    linear-gradient(160deg,var(--bg1),var(--bg2));
  padding-bottom:60px;
}
#app{max-width:820px;margin:0 auto;padding:0 16px}
.wrap{display:block}
h1,h2,h3{margin:0}
.muted{color:var(--muted)}
.sm{font-size:13px}
.hidden{display:none !important}

/* header */
.hd{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 4px 20px;flex-wrap:wrap}
.hd-left{display:flex;align-items:center;gap:9px;cursor:pointer}
.hd-left .flag{font-size:26px}
.hd-left strong{font-size:20px;font-weight:800}
.hd-sub{color:var(--muted);font-size:12px;border-inline-start:1px solid var(--line);padding-inline-start:9px;margin-inline-start:2px}
.hd-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.hd-chip{font-size:12px;font-weight:800;padding:5px 10px;border-radius:99px;background:rgba(99,102,241,.18);border:1px solid var(--line);color:#c7d2fe}
.hd-chip.fire{background:rgba(245,158,11,.16);color:#fcd34d;border-color:rgba(245,158,11,.3)}
.hd-user{font-size:13px;color:var(--muted);max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* buttons */
.btn{font-family:inherit;cursor:pointer;border:1px solid var(--line);background:var(--card2);color:var(--ink);
  border-radius:12px;padding:10px 16px;font-size:14px;font-weight:700;transition:transform .12s,border-color .15s,background .15s}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.primary{background:linear-gradient(135deg,var(--p1),var(--p2));border-color:transparent;color:#fff;box-shadow:0 8px 22px rgba(99,102,241,.35)}
.btn.big{padding:13px 22px;font-size:16px;width:100%;margin-top:6px}
.btn.ghost{background:transparent}
.btn.link{background:none;border:none;color:#c7d2fe;padding:8px;font-weight:700}
.btn.back{background:none;border:none;color:var(--muted);padding:6px 2px;margin-bottom:6px;font-weight:700}
.btn.back.sm{padding:4px 8px}
.btn:disabled{opacity:.7;cursor:default;transform:none}

/* card */
.card{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.012));
  border:1px solid var(--line);border-radius:18px;padding:20px;margin-bottom:16px}

/* auth */
.auth{max-width:420px;margin:20px auto}
.auth h2{font-size:24px;margin-bottom:4px}
.inp{width:100%;margin-top:10px;padding:12px 14px;border-radius:12px;border:1px solid var(--line);
  background:#0e1428;color:var(--ink);font-size:15px;font-family:inherit}
.inp:focus{outline:none;border-color:var(--p2)}
.msg{min-height:18px;margin-top:8px;color:#fca5a5;font-size:13px}

/* hero / cta */
.hero-card{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.hero-card .hero-txt{flex:1;min-width:200px}
.hero-card h2{font-size:22px}
.hero-card .btn{width:auto;margin:0}
.cta{text-align:center}
.cta h2{font-size:24px;margin-bottom:6px}

/* section label */
.sec-label{font-size:12px;font-weight:800;color:var(--muted);text-transform:uppercase;letter-spacing:1.4px;margin:22px 4px 12px;display:flex;align-items:center;gap:10px}
.sec-label::after{content:"";flex:1;height:1px;background:var(--line)}

/* domain grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.card.dom{cursor:pointer;padding:18px;margin:0;display:flex;flex-direction:column;gap:8px;transition:transform .15s,border-color .15s,box-shadow .15s}
.card.dom:hover{transform:translateY(-4px);border-color:var(--p2);box-shadow:var(--shadow)}
.dom-ico{width:48px;height:48px;border-radius:13px;display:grid;place-items:center;font-size:24px;
  background:linear-gradient(135deg,rgba(99,102,241,.22),rgba(34,211,238,.18));border:1px solid var(--line)}
.dom-ico.big{width:40px;height:40px;font-size:22px}
.card.dom h3{font-size:17px;font-weight:800}
.dom-foot{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:2px}
.go{color:#c7d2fe;font-weight:700}

/* progress bar */
.bar{height:8px;border-radius:99px;background:#0e1428;border:1px solid var(--line);overflow:hidden}
.bar-fill{height:100%;background:linear-gradient(90deg,var(--p3),var(--p2));border-radius:99px;transition:width .4s}

.home-actions{display:flex;gap:10px;justify-content:center;margin-top:20px;flex-wrap:wrap}

/* learn / topic list */
.topic-head{display:flex;align-items:center;gap:12px;margin:6px 4px 16px}
.topic-head.sm{margin:0}
.topic-head h2{font-size:22px}
.topic-list{display:flex;flex-direction:column;gap:12px}
.topic-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px;margin:0;cursor:pointer;transition:transform .12s,border-color .15s}
.topic-row:hover{transform:translateY(-2px);border-color:var(--p2)}
.topic-row.locked{opacity:.5;cursor:default}
.topic-row.locked:hover{transform:none;border-color:var(--line)}
.topic-main{flex:1;min-width:0}
.topic-name{font-weight:800;font-size:16px;display:flex;align-items:center;gap:8px;margin-bottom:3px}
.stars{color:#fcd34d;font-size:13px;letter-spacing:1px}
.stars.sm{font-size:11px}
.topic-lv{font-size:12px;color:var(--muted);margin-bottom:8px}
.lock{font-size:20px}

/* lesson */
.lesson h2{font-size:24px;margin-bottom:12px}
.lesson-why{font-size:16px;line-height:1.7;background:rgba(99,102,241,.08);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.lesson-ex{margin:14px 0 8px;font-size:15px;color:var(--muted)}
.lesson-ex b{color:var(--ink);font-size:16px}

/* practice */
.practice{padding-top:6px}
.prog-row{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.prog-bar{flex:1;height:8px;border-radius:99px;background:#0e1428;border:1px solid var(--line);overflow:hidden}
.prog-fill{height:100%;background:linear-gradient(90deg,var(--p3),var(--p2));transition:width .3s}
.prog-txt{font-size:13px;color:var(--muted);font-weight:700;min-width:52px;text-align:center}
.q-topic{font-size:13px;color:var(--muted);font-weight:700;margin:0 4px 10px}
.q-card{padding:26px 22px}
.q-text{font-size:32px;font-weight:800;text-align:center;letter-spacing:.5px;margin-bottom:20px;direction:ltr;unicode-bidi:plaintext}
.q-text.q-word{font-size:19px;font-weight:600;line-height:1.6;direction:rtl}
.answer-row{display:flex;gap:10px}
.answer-row .answer{margin-top:0;text-align:center;font-size:20px;font-weight:700;direction:ltr}
.answer-row .btn{width:auto;white-space:nowrap}
.inp.answer.shake{animation:shake .35s;border-color:var(--bad)}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}

/* multiple choice */
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.opt{font-family:inherit;cursor:pointer;border:1px solid var(--line);background:var(--card2);color:var(--ink);
  border-radius:12px;padding:16px;font-size:20px;font-weight:800;direction:ltr;transition:transform .1s,border-color .15s}
.opt:hover:not(:disabled){transform:translateY(-2px);border-color:var(--p2)}
.opt:disabled{cursor:default}
.opt.correct{background:rgba(34,197,94,.18);border-color:var(--ok);color:#86efac}
.opt.wrong{background:rgba(239,68,68,.16);border-color:var(--bad);color:#fca5a5}

/* feedback */
.feedback{display:none;margin-top:16px;border-radius:12px;padding:14px 16px;border:1px solid var(--line)}
.feedback.show{display:block;animation:fade .25s}
.feedback.ok{background:rgba(34,197,94,.1);border-color:rgba(34,197,94,.4)}
.feedback.bad{background:rgba(239,68,68,.1);border-color:rgba(239,68,68,.4)}
.fb-head{font-weight:800;font-size:17px;margin-bottom:4px}
.feedback.ok .fb-head{color:#86efac}
.feedback.bad .fb-head{color:#fca5a5}
.fb-ans{font-size:15px;margin-bottom:6px}
.fb-sol{font-size:14px;color:var(--muted);direction:ltr;unicode-bidi:plaintext;text-align:right}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* summary */
.summary{text-align:center;padding:30px 22px}
.sum-emo{font-size:56px;line-height:1}
.summary h2{font-size:26px;margin:10px 0 4px}
.sum-acc{color:var(--muted);font-size:16px}
.sum-stars{color:#fcd34d;font-size:28px;letter-spacing:4px;margin-top:10px}
.sum-review{margin-top:18px;text-align:right;background:#0e1428;border:1px solid var(--line);border-radius:12px;padding:14px}
.sum-review-h{font-weight:800;margin-bottom:8px;font-size:14px}
.sum-wrong{font-size:14px;color:var(--muted);padding:4px 0;border-bottom:1px dashed var(--line);direction:ltr;unicode-bidi:plaintext;text-align:right}
.sum-wrong:last-child{border-bottom:none}
.sum-btns{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}
.sum-btns .btn{flex:1;margin-top:0;min-width:140px}

/* stats */
.pg-h{font-size:24px;margin:6px 4px 16px}
.stat-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:18px}
.stat-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center}
.sc-label{font-size:12px;color:var(--muted);font-weight:700}
.sc-big{font-size:24px;font-weight:800;margin:4px 0}
.sc-sub{font-size:12px;color:var(--muted)}
.dom-stat{padding:16px}
.dom-pct{margin-inline-start:auto;color:#c7d2fe;font-weight:800}
.dom-stat .topic-head{margin-bottom:12px}
.srow{display:grid;grid-template-columns:1fr 90px 44px;align-items:center;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line)}
.srow:last-child{border-bottom:none}
.srow-name{font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px}
.srow-n{font-size:12px;color:var(--muted);text-align:center}

/* footer */
.ft{text-align:center;color:var(--muted);font-size:13px;margin:30px 0 10px}
.ft a{color:#c7d2fe;text-decoration:none}

@media(max-width:520px){
  .q-text{font-size:26px}
  .stat-cards{grid-template-columns:1fr}
  .srow{grid-template-columns:1fr 70px 40px}
  .hero-card .btn.big{width:100%}
}