:root {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #172033;
  background: #f3f5f8;
}
* { box-sizing: border-box; }
body { margin: 0; }
.app { width: min(920px, calc(100% - 32px)); margin: 40px auto; }
.hero { text-align: center; margin-bottom: 24px; }
h1 { margin: 0 0 8px; font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { margin-top: 0; }
.card {
  background: white;
  border: 1px solid #dde3ee;
  border-radius: 18px;
  padding: 24px;
  margin: 18px 0;
  box-shadow: 0 14px 40px rgba(27, 39, 66, 0.08);
}
.small { font-size: 0.95rem; }
.file-box {
  display: grid;
  place-items: center;
  border: 2px dashed #8aa0c3;
  border-radius: 16px;
  min-height: 130px;
  cursor: pointer;
  background: #f8fbff;
  font-size: 1.2rem;
  font-weight: 700;
}
.file-box input { display: none; }
.muted { color: #63708a; }
.status { min-height: 1.4em; font-weight: 700; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin: 18px 0; }
label { font-weight: 700; display: grid; gap: 8px; }
input, select, button, .button {
  font: inherit;
  border-radius: 12px;
  border: 1px solid #c7d1e3;
  padding: 12px 14px;
}
.check { display: flex; align-items: center; gap: 10px; font-weight: 600; margin-bottom: 18px; }
.check input { width: 18px; height: 18px; }
button, .button {
  display: inline-block;
  text-decoration: none;
  background: #172033;
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 800;
}
button:disabled { opacity: 0.45; cursor: not-allowed; }
.secondary { background: #eaf0fa; color: #172033; }
.downloads { display: flex; flex-wrap: wrap; gap: 12px; }
.instructions { line-height: 1.75; }
.warning { background: #fff8df; border: 1px solid #f1d36e; padding: 14px; border-radius: 12px; }
.hidden { display: none; }
code { background: #eef2f8; padding: 2px 6px; border-radius: 6px; }