:root{
  --bg1:#fff7e6;
  --bg2:#e8f7ff;
  --card:#ffffff;
  --ink:#1f2a37;
  --muted:#6b7280;
  --good:#16a34a;
  --bad:#dc2626;
  --accent:#7c3aed;
  --accent2:#06b6d4;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Arial, "Noto Sans Hebrew", sans-serif;
  color:var(--ink);
  background: radial-gradient(circle at 20% 10%, var(--bg2), transparent 45%),
              radial-gradient(circle at 80% 0%, var(--bg1), transparent 55%),
              linear-gradient(180deg, #fff, #f8fafc);
  min-height:100vh;
}

header{
  padding:18px 14px 8px;
  text-align:center;
}

h1{
  margin:0;
  font-size:28px;
}
.subtitle{
  margin:6px 0 0;
  color:var(--muted);
  font-size:14px;
}

nav{
  display:flex;
  gap:8px;
  justify-content:center;
  flex-wrap:wrap;
  padding:10px 12px 18px;
}
nav a{
  text-decoration:none;
  background: rgba(124,58,237,.12);
  border: 1px solid rgba(124,58,237,.25);
  color: var(--accent);
  padding:8px 12px;
  border-radius:999px;
  font-weight:700;
  transition: transform .08s ease;
}
nav a:hover{ transform: translateY(-1px); }

main{
  max-width:920px;
  margin:0 auto;
  padding:0 12px 28px;
}

.card{
  background:var(--card);
  border:1px solid rgba(31,41,55,.10);
  border-radius:18px;
  padding:16px;
  box-shadow: 0 10px 30px rgba(2,6,23,.06);
}

.topbar{
  display:flex;
  justify-content:flex-start;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom:12px;
}
.badge{
  background: rgba(6,182,212,.12);
  border: 1px solid rgba(6,182,212,.22);
  color:#0e7490;
  padding:6px 10px;
  border-radius:999px;
  font-weight:700;
  font-size:13px;
}
.actions{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}
button{
  border:0;
  border-radius:12px;
  padding:10px 12px;
  font-weight:800;
  cursor:pointer;
  box-shadow: 0 6px 14px rgba(2,6,23,.08);
}
.btn-new{ background: var(--accent); color:#fff; }
.btn-retry{ background: #f97316; color:#fff; }
.btn-check{ background: #10b981; color:#fff; }

.grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:10px;
}
@media (max-width:720px){
  .grid{ grid-template-columns:1fr; }
}

input[type="number"]{
  width:120px;
  padding:10px 10px;
  border-radius:12px;
  border:1px solid rgba(31,41,55,.22);
  font-size:16px;
  font-weight:800;
}
.result{
  font-weight:900;
  font-size:14px;
}
.good{ color:var(--good); }
.bad{ color:var(--bad); }

.footerNote{
  margin-top:12px;
  color:var(--muted);
  font-size:13px;
  display:flex;
  justify-content:flex-start;
  flex-wrap:wrap;
  gap:8px;
}

.kid{
  font-size:34px;
  line-height:1;
}

.titleBlock h1{
  margin:0;
  font-size:30px;
}
.titleBlock .subtitle{
  margin-top:6px;
}
.kid{
  font-size:26px;
  line-height:1;
  margin-bottom:6px;
}/* ===== Header aligned to exercise card width ===== */
header{
  padding:0;
}

.headerBand{
  direction:ltr;
  background: linear-gradient(90deg, rgba(232,247,255,.9), rgba(255,247,230,.9));
  border-bottom: 1px solid rgba(31,41,55,.10);
}

.headerInner{
  max-width:920px;
  margin:0 auto;
  padding:18px 16px 12px;
  display:flex;
  align-items:center;
  gap:22px;
}

.brand{
  flex:0 0 auto;
}

.logo{
  display:block;
  width:240px;
  max-width:40vw;
  height:auto;
}

.titleBlock{
  flex:1;
  direction:rtl;
  text-align:center;
}

.titleBlock h1{
  margin:0;
  font-size:30px;
}

.titleBlock .subtitle{
  margin-top:6px;
}

/* ===== Exercises (keep correct) ===== */
.item{
  border:1px dashed rgba(31,41,55,.20);
  border-radius:14px;
  padding:12px;
  display:flex;
  align-items:center;
  gap:10px;
  direction:ltr;
  justify-content:flex-start;
}

.expr{
  font-size:18px;
  font-weight:900;
  direction:ltr;
  text-align:left;
  white-space:nowrap;
}

.inputWrap{
  display:flex;
  align-items:center;
  gap:8px;
  direction:ltr;
}