:root {
  color-scheme: light;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

body {
  margin: 0;
  background: #f1f1f1;
  color: #1f1f1f;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

h1 {
  margin: 0;
}

.subtitle {
  margin-top: 0.4rem;
  color: #5a5a5a;
}

.panel {
  background: #ffffff;
  border-radius: 12px;
  padding: 1rem;
  margin-top: 1rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
}

.controls,
.export {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.upload {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  border-radius: 10px;
  background: #2f6feb;
  color: white;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
}

.upload input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

button {
  border: 1px solid #d0d0d0;
  border-radius: 10px;
  padding: 0.55rem 0.9rem;
  background: white;
  cursor: pointer;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}


.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: #2d2d2d;
}

.checkbox input {
  margin: 0;
}

.dropzone {
  border: 2px dashed #a0a0a0;
  min-height: 76px;
  display: grid;
  place-items: center;
  color: #5d5d5d;
}

.dropzone.dragging {
  border-color: #2f6feb;
  color: #2f6feb;
  background: #f0f6ff;
}

.canvas-panel {
  overflow: auto;
}

canvas {
  width: min(100%, 1000px);
  height: auto;
  background: #f7f7f7;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
}