* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

header {
  padding: 16px 24px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.3);
}

header h1 {
  margin: 0 0 4px;
  font-size: 20px;
}

header p {
  margin: 0;
  font-size: 13px;
  color: #9ca3af;
}

main {
  display: flex;
  flex-wrap: wrap;
  padding: 16px;
  gap: 16px;
}

.panel {
  flex: 0 0 320px;
  max-width: 420px;
  padding: 16px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.canvas-panel {
  flex: 1 1 400px;
  min-width: 300px;
  padding: 8px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(148, 163, 184, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

#canvas {
  max-width: 100%;
  max-height: calc(100vh - 160px);
  border-radius: 8px;
  background: #020617;
}

#status {
  font-size: 13px;
  margin-bottom: 8px;
  color: #a5b4fc;
}

.drop-zone {
  border: 2px dashed rgba(129, 140, 248, 0.8);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  cursor: pointer;
  background: rgba(30, 64, 175, 0.25);
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.drop-zone.dragover {
  background: rgba(59, 130, 246, 0.4);
  border-color: #60a5fa;
  transform: translateY(-1px);
}

.drop-zone p {
  margin: 0;
  font-size: 14px;
  color: #e5e7eb;
}

#file-input {
  display: none;
}

.controls {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 12px;
}

.controls label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: #cbd5f5;
}

.controls input[type="number"] {
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: #020617;
  color: #e5e7eb;
  width: 90px;
}

.info {
  margin-top: 12px;
  font-size: 12px;
  color: #9ca3af;
  overflow-x: hidden;
  white-space: pre-wrap;
}

.info::-webkit-scrollbar {
  width: 6px;
}

.info::-webkit-scrollbar-track {
  background: transparent;
}

.info::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.3);
  border-radius: 3px;
}

.info::-webkit-scrollbar-thumb:hover {
  background: rgba(148, 163, 184, 0.5);
}

footer {
  padding: 8px 16px 16px;
  font-size: 11px;
  color: #6b7280;
}

footer a {
  color: #60a5fa;
  text-decoration: none;
  transition: color 0.15s ease;
}

footer a:hover {
  color: #93c5fd;
  text-decoration: underline;
}

@media (max-width: 800px) {
  main {
    flex-direction: column;
  }

  .panel {
    max-width: 100%;
  }
}