:root{
  --bg:#FFF8F0; --card:#ffffff; --ink:#2d2a32; --muted:#6b6b7a;
  --pink:#ff6b9d; --orange:#ff9f43; --yellow:#ffd32a; --green:#2ed573;
  --blue:#54a0ff; --purple:#a55eea; --teal:#1dd1a1;
  --radius:18px; --shadow:0 6px 20px rgba(0,0,0,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; font-family:"Heebo","Segoe UI",Arial,sans-serif;
  background:var(--bg); color:var(--ink); line-height:1.7; font-size:18px;
}
header.hero{
  background:linear-gradient(135deg,#a55eea,#ff6b9d 55%,#ff9f43);
  color:#fff; padding:34px 20px 26px; text-align:center;
  border-radius:0 0 28px 28px; box-shadow:var(--shadow);
}
header.hero h1{margin:0 0 6px; font-size:2.2rem}
header.hero p{margin:6px 0; font-size:1.15rem}
.badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:12px}
.badge{background:rgba(255,255,255,.22);border:2px solid rgba(255,255,255,.5);
  padding:6px 14px;border-radius:999px;font-weight:700}
nav.topnav{
  position:sticky;top:0;z-index:50;background:#fff;border-bottom:2px solid #f1e6d8;
  display:flex;gap:8px;overflow-x:auto;padding:10px 12px;align-items:center;
}
nav.topnav a{
  white-space:nowrap;text-decoration:none;color:var(--ink);font-weight:700;
  background:#fdf1e3;border:2px solid #f3ddc2;padding:6px 14px;border-radius:999px;font-size:.95rem;
}
nav.topnav a:hover{background:var(--yellow);border-color:#eab308}
.progress-wrap{background:#fff;padding:10px 16px;border-bottom:1px solid #eee;
  position:sticky;top:53px;z-index:40}
.progress-bar{height:14px;background:#f1e6d8;border-radius:999px;overflow:hidden}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,var(--teal),var(--blue),var(--purple));
  transition:width .4s;border-radius:999px}
.progress-text{font-size:.9rem;color:var(--muted);margin-top:4px}
main{max-width:980px;margin:0 auto;padding:20px 16px 60px}
section.card{
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:22px 20px;margin:22px 0;border-top:8px solid var(--blue);
}
section.card h2{margin:0 0 8px;font-size:1.6rem}
section.card h3{color:#444;margin:18px 0 8px}
section.card.pink{border-color:var(--pink)}
section.card.orange{border-color:var(--orange)}
section.card.green{border-color:var(--green)}
section.card.purple{border-color:var(--purple)}
section.card.teal{border-color:var(--teal)}
section.card.yellow{border-color:var(--yellow)}
.kid{font-size:1.05rem}
.example{
  background:#f8fbff;border:2px dashed var(--blue);border-radius:14px;
  padding:14px;margin:12px 0;
}
.example ol{margin:8px 0;padding-right:22px}
.example .result{background:#e8f8ec;border-radius:10px;padding:8px 12px;margin-top:8px;
  font-weight:800;color:#1a7a3a}
.tip{background:#fffbe6;border:2px solid var(--yellow);border-radius:14px;padding:12px;margin:12px 0}
.tip strong{color:#92690e}
.frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;
  margin:0 6px;font-weight:800;line-height:1.25}
.frac .top{border-bottom:3px solid var(--ink);padding:0 10px;line-height:1.35}
.frac .bot{padding:0 10px;line-height:1.35}
.quiz .opts button .frac,.game .controls button .frac,.vis-label .frac{margin:0 2px}
.quiz .opts button .frac .top,.game .controls button .frac .top{border-bottom-color:currentColor;padding:0 6px}
.quiz .opts button .frac .bot,.game .controls button .frac .bot{padding:0 6px}
/* מספר מעורב: שלם גדול צמוד לשבר — תמיד משמאל לימין כמו במחברת */
.mixed{display:inline-flex;align-items:center;gap:7px;vertical-align:middle;direction:ltr;unicode-bidi:isolate}
.mixed-w{font-size:1.4em;font-weight:800;line-height:1}
.pizza-row{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;align-items:center}
.vis-box.wide{min-width:260px}
.vis-box.mini{min-width:120px;padding:8px}
.gallery{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin:12px 0}
/* בידוד מתמטיקה מכיווניות RTL */
.math{direction:ltr;unicode-bidi:isolate;display:inline-block}
.golden{background:#fff4e0;border:3px solid var(--orange);border-radius:14px;padding:14px;margin:12px 0;font-size:1.1rem}
.golden strong{color:#b25b00}
/* קלט שבר ערוך: מונה מעל קו, מכנה מתחת */
.frac-input{display:inline-flex;flex-direction:column;align-items:center;gap:2px;
  background:#fff;border:2px solid #e5d9ff;border-radius:12px;padding:8px 10px}
.frac-input input{width:64px;font-size:1.1rem;padding:4px;border-radius:8px;
  border:2px solid #ccc;text-align:center}
.frac-input .frac-line{width:64px;height:3px;background:var(--ink);border-radius:2px}
.plus-sign{font-size:1.6rem;font-weight:800}
/* אזור תרגול נוסף */
.practice{background:#f0f9ff;border:2px solid var(--blue);border-radius:16px;padding:16px;margin:14px 0}
.practice .p-q{font-size:1.25rem;font-weight:800;text-align:center;margin:8px 0;min-height:2em}
.practice .p-opts{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.practice .p-opts button{border:2px solid var(--blue);background:#fff;border-radius:999px;
  padding:8px 18px;font-size:1.05rem;font-weight:800;cursor:pointer}
.practice .p-opts button.correct{background:var(--green);color:#fff;border-color:var(--green)}
.practice .p-opts button.wrong{background:#ff6b6b;color:#fff;border-color:#ff6b6b}
.practice .p-fb{text-align:center;font-weight:700;min-height:1.8em;margin-top:8px}
.practice .p-row{display:flex;gap:10px;align-items:center;justify-content:center;margin-top:8px;flex-wrap:wrap}
.practice .p-score{background:#222;color:#fff;border-radius:999px;padding:4px 16px;font-weight:800}
.before-after{display:flex;gap:6px;align-items:center;justify-content:center;flex-wrap:wrap;margin:10px 0}
.before-after .arrow{font-size:2rem;font-weight:800;color:var(--orange)}
.vis-row{display:flex;gap:16px;flex-wrap:wrap;align-items:center;justify-content:center;margin:12px 0}
.vis-box{background:#fafafa;border:2px solid #eee;border-radius:14px;padding:10px;text-align:center;min-width:170px}
.vis-box svg{display:block;margin:0 auto}
.vis-label{font-weight:800;margin-top:6px}
.controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:center;margin:10px 0}
.controls label{background:#fff;border:2px solid #e5d9ff;border-radius:12px;padding:8px 12px;font-weight:700}
.controls input[type=number]{width:80px;font-size:1.1rem;padding:6px;border-radius:8px;border:2px solid #ccc;text-align:center}
.controls input[type=range]{width:180px}
button.btn{
  border:none;border-radius:999px;padding:10px 22px;font-size:1.05rem;font-weight:800;
  cursor:pointer;background:var(--blue);color:#fff;box-shadow:0 4px 0 rgba(0,0,0,.15);
}
button.btn:hover{filter:brightness(1.05)}
button.btn:active{transform:translateY(2px);box-shadow:none}
button.btn.green{background:var(--green)} button.btn.pink{background:var(--pink)}
button.btn.orange{background:var(--orange)} button.btn.purple{background:var(--purple)}
.quiz{background:#f6f3ff;border-radius:14px;padding:14px;margin:12px 0;border:2px solid #d9c8ff}
.quiz .q{font-weight:800;margin-bottom:8px}
.quiz .opts{display:flex;gap:8px;flex-wrap:wrap}
.quiz .opts button{
  border:2px solid #c9b8ff;background:#fff;border-radius:999px;padding:8px 16px;
  font-size:1rem;font-weight:700;cursor:pointer;
}
.quiz .opts button.correct{background:var(--green);color:#fff;border-color:var(--green)}
.quiz .opts button.wrong{background:#ff6b6b;color:#fff;border-color:#ff6b6b}
.quiz .feedback{margin-top:8px;font-weight:700;min-height:1.6em}
.game{background:#fff7f0;border:2px solid var(--orange);border-radius:16px;padding:16px;margin:14px 0}
.score{font-size:1.2rem;font-weight:800;background:#222;color:#fff;display:inline-block;
  padding:4px 16px;border-radius:999px;margin:6px 0}
footer{text-align:center;color:var(--muted);padding:24px;font-size:.95rem}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:700px){.grid2{grid-template-columns:1fr} body{font-size:17px} header.hero h1{font-size:1.7rem}}
.big-emoji{font-size:2rem}
table.steps{width:100%;border-collapse:collapse;margin:10px 0}
table.steps td,table.steps th{border:2px solid #eee;padding:8px;border-radius:6px}
table.steps th{background:#f3f0ff}