.tool-page{ padding: 150px 0 100px; }
.tool-header{ text-align: center; max-width: 600px; margin: 0 auto 40px; }
.tool-header h1{ font-size: clamp(2rem, 4.5vw, 2.8rem); font-weight: 900; letter-spacing: -0.03em; margin-bottom: 12px; }
.tool-header p{ color: var(--ink-soft); font-size: 1rem; }
.back-link{ display: inline-flex; align-items: center; gap: 6px; font-size: 0.85rem; font-weight: 700; color: var(--ink-faint); margin-bottom: 18px; transition: color .2s ease, gap .2s ease; }
.back-link:hover{ color: var(--ink); gap: 10px; }
.back-link svg{ width: 14px; height: 14px; }

.qr-layout{
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 28px;
  align-items: start;
  max-width: 980px;
  margin: 0 auto;
}

.tool-shell{
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 36px;
}
.qr-form-col label{ font-weight: 700; font-size: 0.85rem; margin-bottom: 8px; display: block; color: var(--ink); }
.qr-form-col input[type="text"]{
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 0.92rem; font-family: inherit; background: #fff; color: var(--ink);
  margin-bottom: 14px; transition: border-color .2s ease;
}
.qr-form-col input[type="text"]:focus{ outline: none; border-color: var(--marketing); }
.qr-form-col input[type="range"]{ width: 100%; accent-color: var(--marketing); }

.qr-hide{ display: none; }

.pill-options{ display: flex; gap: 8px; flex-wrap: wrap; }
.pill-option{
  font-family: inherit; border: 1px solid var(--line); background: #fff; color: var(--ink-soft);
  padding: 9px 16px; border-radius: 999px; font-weight: 700; font-size: 0.82rem; cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.pill-option.active{ background: var(--ink); color: var(--yellow); border-color: var(--ink); }
.pill-option:hover:not(.active){ border-color: var(--yellow-line); background: var(--yellow-soft); }

.qr-color-row{ display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.qr-color-row input[type="color"]{ width: 100%; height: 44px; border: 1px solid var(--line); border-radius: var(--radius-sm); cursor: pointer; padding: 4px; }

.btn-block{ width: 100%; justify-content: center; }

.qr-preview-col{ position: sticky; top: 110px; }
.qr-preview-frame{
  background: var(--yellow-soft); border: 1px solid var(--yellow-line);
  border-radius: var(--radius-lg); padding: 30px; text-align: center;
}
.qr-canvas-wrap{
  background: #fff; border-radius: var(--radius-md); padding: 20px;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow);
}
#qrCanvas{ display: block; max-width: 100%; height: auto; }
.qr-label-preview{
  margin-top: 14px; font-weight: 700; font-size: 0.9rem; color: var(--ink);
  min-height: 1.4em;
}

@media (max-width: 900px){
  .qr-layout{ grid-template-columns: 1fr; }
  .qr-preview-col{ position: static; }
}