*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Heebo","Assistant","Rubik",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;background:#f5f3ff;color:#1f2340;font-size:17px;line-height:1.6;overflow-x:hidden}
a{color:#3730a3}
.skip{position:absolute;right:-999px;top:0;background:#fff;padding:8px 12px;z-index:50}
.skip:focus{right:8px}
:focus-visible{outline:3px solid #f59e0b;outline-offset:2px}
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 12px;background:linear-gradient(135deg,#4338ca,#6d28d9);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.18)}
.brand{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none;font-weight:800;font-size:19px;line-height:1.25;min-width:0}
.b-ic{font-size:26px}
.b-t{min-width:0}
.top img.rl-top{width:48px!important;height:48px!important;flex-basis:48px!important}
.method{margin:0;padding:8px 14px;background:#fff7ed;border-bottom:1px solid #fed7aa;font-size:15px;text-align:center}
.method a{font-weight:700;color:#9a3412}
main{max-width:860px;margin:0 auto;padding:14px 12px 30px}
.intro{background:#fff;border-radius:18px;padding:14px 16px;margin:4px 0 14px;box-shadow:0 2px 8px rgba(55,48,163,.08)}
.intro h1{margin:0 0 6px;font-size:23px;line-height:1.3}
.intro p{margin:6px 0}
.ways{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px;padding:0;list-style:none}
.ways li{background:#eef2ff;border-radius:999px;padding:4px 10px;font-size:15px;font-weight:600}
.cards{display:grid;gap:14px}
@media(min-width:700px){.cards{grid-template-columns:repeat(3,1fr)}}
.lcard{display:flex;flex-direction:column;gap:6px;background:#fff;border-radius:20px;padding:16px;text-decoration:none;color:inherit;border-top:8px solid var(--c);box-shadow:0 3px 12px rgba(0,0,0,.08);min-height:180px}
.lcard .em{font-size:40px;line-height:1}
.lcard h2{margin:0;font-size:22px;line-height:1.3}
.lcard .sub{font-size:15px;color:#4b5072}
.chip{display:inline-block;background:var(--c);color:#fff;border-radius:999px;padding:2px 10px;font-size:14px;font-weight:700;align-self:flex-start}
.go{margin-top:auto;display:block;text-align:center;background:var(--c);color:#fff;border-radius:14px;padding:12px;font-weight:800;font-size:18px}
.back{display:inline-flex;align-items:center;min-height:48px;padding:8px 16px;border-radius:14px;background:#fff;border:2px solid #c7d2fe;font-weight:700;text-decoration:none;color:#3730a3;margin-bottom:10px}
.hero{background:var(--c);color:#fff;border-radius:20px;padding:16px;margin-bottom:12px}
.hero .em{font-size:40px;line-height:1}
.hero h1{margin:4px 0;font-size:25px;line-height:1.25}
.hero .sub{opacity:.95;font-size:16px}
.hero .chip{background:#fff;color:var(--c);margin-top:6px}
.idea{background:#fff;border-radius:16px;padding:12px 14px;margin-bottom:12px;border-inline-start:6px solid var(--c)}
.idea h2{margin:0 0 4px;font-size:18px}
.idea p{margin:0}
.btns{display:grid;gap:10px;margin:0 0 14px}
@media(min-width:600px){.btns{grid-template-columns:1fr 1fr}}
.bigbtn{display:flex;align-items:center;justify-content:center;gap:8px;min-height:56px;padding:10px 14px;border-radius:16px;font-weight:800;font-size:18px;text-decoration:none;text-align:center;border:0;cursor:pointer;font-family:inherit}
.bigbtn.pdf{background:#dc2626;color:#fff;box-shadow:0 4px 0 #991b1b}
.bigbtn.src{background:#fff;color:var(--c);border:2px solid var(--c)}
.jump{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px}
.jump button{min-height:52px;border-radius:14px;border:2px solid var(--c);background:#fff;color:#1f2340;font-weight:700;font-size:16px;font-family:inherit;cursor:pointer;padding:6px}
details.part{background:#fff;border-radius:18px;margin-bottom:12px;box-shadow:0 2px 10px rgba(0,0,0,.07);overflow:hidden}
details.part>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;padding:14px 16px;min-height:60px;font-weight:800;font-size:19px;line-height:1.3}
details.part>summary::-webkit-details-marker{display:none}
details.part>summary .pi{font-size:28px}
details.part>summary .pt{flex:1}
details.part>summary .pt small{display:block;font-weight:500;font-size:14px;color:#4b5072}
details.part>summary::after{content:"＋";font-size:24px;color:var(--c)}
details.part[open]>summary::after{content:"－"}
details.part[open]>summary{border-bottom:2px solid #eef2ff}
.pbody{padding:12px 16px 16px}
.pbody h3{font-size:18px;margin:10px 0 6px}
.pbody p{margin:8px 0}
.note{background:#fef9c3;border-radius:10px;padding:4px 10px;font-size:15px;display:inline-block}
.link-box{background:#ecfdf5;border-radius:14px;padding:6px 14px;margin-top:10px;border:2px dashed #10b981}
.qlist{margin:0;padding:0;list-style:none;counter-reset:q}
.qlist>li{counter-increment:q;border-radius:14px;background:#f8fafc;padding:10px 12px;margin:0 0 10px;border:1px solid #e2e8f0}
.qlist>li .qq::before{content:"שאלה " counter(q) ": ";font-weight:800;color:var(--c)}
.ans{margin-top:6px;background:#eef2ff;border-radius:10px;padding:6px 10px;font-size:16px}
.ans b.lbl,.hints b.lbl{color:#3730a3}
.hints{margin:6px 0 0;padding:0 18px 0 0}
.hints li{margin:3px 0}
.hint-lbl{font-weight:800;color:#b45309;margin-top:6px}
.teacher{background:#eef2ff;border-radius:12px;padding:8px 12px;margin-top:10px}
.teacher ul{margin:4px 0;padding-inline-start:20px}
table.tbl{border-collapse:collapse;width:100%;margin:8px 0;font-size:15px}
.tbl th,.tbl td{border:1px solid #cbd5e1;padding:6px 8px;text-align:right;vertical-align:top}
.tbl th{background:#eef2ff}
.rubric h3{margin-top:14px}
.copyrow{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.copy{min-height:52px;padding:8px 16px;border-radius:14px;border:0;background:var(--c);color:#fff;font-weight:800;font-size:17px;font-family:inherit;cursor:pointer;box-shadow:0 3px 0 rgba(0,0,0,.25);flex:1 1 auto}
.copy.alt{background:#fff;color:var(--c);border:2px solid var(--c);box-shadow:none}
.copy.ok{background:#16a34a!important;color:#fff!important;border-color:#16a34a!important}
.howto{background:#fff;border-radius:16px;padding:10px 14px;font-size:15px;color:#374151;margin-top:14px}
.foot{text-align:center;padding:18px 12px 28px;font-weight:700;color:#3730a3}
.toast{position:fixed;bottom:18px;left:50%;transform:translateX(-50%) translateY(120px);background:#111827;color:#fff;padding:10px 18px;border-radius:999px;font-weight:700;transition:transform .25s;z-index:60;pointer-events:none;visibility:hidden}
.toast.show{transform:translateX(-50%) translateY(0);visibility:visible}
@media print{.top,.method,.back,.btns,.jump,.copyrow,.foot,.toast{display:none!important}details.part{box-shadow:none;border:1px solid #ccc}}
details.part{scroll-margin-top:76px}
.m{unicode-bidi:isolate;white-space:nowrap;font-variant-numeric:tabular-nums}