:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07111f;
  color: #f4f7fb;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #07111f, #13253d);
}
.app-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}
.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  margin-bottom: 24px;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 0.8rem;
  color: #83c7ff;
  margin-bottom: 8px;
}
h1 { font-size: 2rem; margin: 0 0 10px; }
.subtext { max-width: 640px; color: #b7c4d2; line-height: 1.6; }
.controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 260px;
}
.upload-card,
.primary-btn,
.secondary-btn,
.select-group {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  background: rgba(255,255,255,0.08);
  padding: 12px 14px;
}
.upload-card input { display: none; }
button,
select {
  font: inherit;
  border: none;
  cursor: pointer;
}
.primary-btn { background: linear-gradient(135deg, #2d7cff, #4dc4ff); color: white; }
.secondary-btn { background: #18304c; color: white; }
.secondary-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.select-group { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
select { background: transparent; color: white; }
.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.preview-card {
  background: rgba(255,255,255,0.06);
  padding: 16px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
}
.preview-card canvas {
  width: 100%;
  height: auto;
  border-radius: 12px;
  background: #0d1724;
  min-height: 320px;
}
.status {
  margin-top: 16px;
  color: #8fbed9;
}
@media (max-width: 900px) {
  .hero { flex-direction: column; align-items: stretch; }
  .result-grid { grid-template-columns: 1fr; }
}