* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--tt-bg, #f5f7fb);
  color: var(--tt-text, #172033);
  font-family: var(--tt-font, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
}
.page-shell {
  max-width: var(--tt-maxw, 1120px);
  margin: 0 auto;
  padding: calc(var(--tt-gap, 16px) * 1.5);
}
.tool-card {
  background: var(--tt-surface, #ffffff);
  border: 1px solid var(--tt-line, #d9e1ef);
  border-radius: var(--tt-radius, 12px);
  box-shadow: var(--tt-shadow, 0 10px 30px rgba(23, 32, 51, 0.08));
  padding: calc(var(--tt-gap, 16px) * 1.5);
}
.hero-copy h1 { margin: 0 0 8px; font-size: clamp(2rem, 4vw, 3rem); }
.eyebrow { color: var(--tt-primary, #2563eb); font-weight: 700; margin: 0 0 6px; }
.intro, .hint, .below-copy p { color: var(--tt-muted, #5d6b82); line-height: 1.55; }
.notice {
  margin: 18px 0;
  padding: 12px 14px;
  background: var(--tt-primary-soft, #e9f1ff);
  border: 1px solid var(--tt-line, #d9e1ef);
  border-radius: var(--tt-radius, 12px);
  color: var(--tt-text, #172033);
}
.input-panel {
  display: grid;
  gap: 8px;
  padding: 14px;
  background: var(--tt-surface-soft, #fbfdff);
  border: 1px dashed var(--tt-line, #d9e1ef);
  border-radius: var(--tt-radius, 12px);
}
label { font-weight: 700; }
input[type="file"], input {
  width: 100%;
  border: 1px solid var(--tt-line, #d9e1ef);
  border-radius: calc(var(--tt-radius, 12px) * .75);
  padding: 10px 12px;
  color: var(--tt-text, #172033);
  background: var(--tt-surface, #ffffff);
  font: inherit;
}
.status { margin: 16px 0; color: var(--tt-muted, #5d6b82); }
.error {
  margin: 14px 0;
  padding: 12px;
  border-radius: var(--tt-radius, 12px);
  color: var(--tt-danger, #b42318);
  background: var(--tt-surface-soft, #fbfdff);
  border: 1px solid var(--tt-danger, #b42318);
}
.grid {
  display: grid;
  grid-template-columns: minmax(150px, 220px) 1fr;
  gap: 12px 16px;
  align-items: center;
  margin-top: 16px;
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
button {
  border: 0;
  border-radius: var(--tt-radius, 12px);
  background: var(--tt-primary, #2563eb);
  color: var(--tt-surface, #ffffff);
  padding: 11px 16px;
  font-weight: 700;
  cursor: pointer;
}
button:hover { background: var(--tt-primary-dark, #1d4ed8); }
button:disabled { opacity: .55; cursor: not-allowed; }
.downloads { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.downloads a {
  color: var(--tt-primary, #2563eb);
  background: var(--tt-primary-soft, #e9f1ff);
  border-radius: calc(var(--tt-radius, 12px) * .75);
  padding: 8px 10px;
}
.below-copy {
  margin-top: 24px;
  background: var(--tt-surface, #ffffff);
  border: 1px solid var(--tt-line, #d9e1ef);
  border-radius: var(--tt-radius, 12px);
  padding: calc(var(--tt-gap, 16px) * 1.25);
}
@media (max-width: 680px) {
  .grid { grid-template-columns: 1fr; }
  .page-shell { padding: var(--tt-gap, 16px); }
}