:root {
  --brand-start: #0066ff;
  --brand-end: #33aaff;
  --text: #0f172a;
  --muted: #64748b;
  --surface: #ffffff;
  --line: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Manrope", "Segoe UI", sans-serif;
}

.drop-zone {
  transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.drop-zone.drag-over {
  border-color: var(--brand-start) !important;
  background: #eff6ff !important;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0, 102, 255, 0.12);
}

.btn-primary {
  background-image: linear-gradient(135deg, var(--brand-start), var(--brand-end));
}

.preview-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
}

.preview-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #f1f5f9;
}

.tool-shell {
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
}

.ad-box {
  border: 2px dashed #cbd5e1;
  border-radius: 20px;
  background: #ffffff;
}

input[type="range"] {
  accent-color: #0066ff;
}

.crop-stage {
  position: relative;
  display: inline-block;
  max-width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 16px;
  overflow: hidden;
  touch-action: none;
}

.crop-stage img {
  display: block;
  max-width: 100%;
  height: auto;
}

.crop-selection {
  position: absolute;
  border: 2px solid #0066ff;
  background: rgba(51, 170, 255, 0.2);
  display: none;
  pointer-events: none;
}

.hidden {
  display: none !important;
}