* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2d3436;
  --secondary-color: #636e72;
  --accent-color: #0984e3;
  --bg-color: #f8f9fa;
  --card-bg: #ffffff;
  --border-color: #dfe6e9;
  --text-primary: #2d3436;
  --text-secondary: #636e72;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: #3d3a35;
  background-image:
    radial-gradient(ellipse at 20% 30%, rgba(90, 75, 60, 0.5) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(85, 70, 55, 0.4) 0%, transparent 45%),
    radial-gradient(ellipse at 40% 80%, rgba(80, 65, 50, 0.35) 0%, transparent 50%),
    radial-gradient(ellipse at 90% 70%, rgba(95, 80, 65, 0.4) 0%, transparent 40%),
    radial-gradient(ellipse at 10% 90%, rgba(75, 60, 45, 0.35) 0%, transparent 45%),
    radial-gradient(ellipse at 60% 50%, rgba(100, 85, 70, 0.3) 0%, transparent 55%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

main {
  display: block;
}

@media (min-width: 900px) {
  main {
    display: grid;
    grid-template-columns: 1fr 350px;
    grid-template-rows: auto 1fr;
    gap: 24px;
    align-items: start;
  }

  .dropzone {
    grid-column: 1;
    grid-row: 1;
  }

  .preview-area {
    grid-column: 1;
    grid-row: 1;
  }

  .settings-panel {
    grid-column: 2;
    grid-row: 1 / 3;
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
  }
}

/* Header */
header {
  text-align: center;
  margin-bottom: 30px;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: #f5f0eb;
  letter-spacing: -0.5px;
}

.subtitle {
  color: #a89f95;
  font-size: 0.9rem;
  margin-top: 4px;
}

/* Dropzone */
.dropzone {
  background: var(--card-bg);
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  padding: 60px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent-color);
  background: rgba(9, 132, 227, 0.05);
}

.dropzone-content {
  pointer-events: none;
}

.upload-icon {
  width: 48px;
  height: 48px;
  color: var(--secondary-color);
  margin-bottom: 16px;
}

.dropzone p {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.dropzone .hint {
  font-size: 0.8rem;
  color: #b2bec3;
}

/* Preview Area */
.preview-area {
  background: transparent;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.preview-area.dragover {
  background: rgba(9, 132, 227, 0.1);
  box-shadow: 0 0 0 2px var(--accent-color);
}

.preview-area canvas {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 4px;
}

/* Settings Panel */
.settings-panel {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.settings-panel h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.setting-group {
  margin-bottom: 20px;
}

.setting-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* Color Options */
.color-options {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-btn,
.text-color-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 2px solid var(--border-color);
  background: transparent;
  cursor: pointer;
  padding: 4px;
  transition: all 0.2s ease;
}

.color-btn:hover,
.color-btn.active,
.text-color-btn:hover,
.text-color-btn.active {
  border-color: var(--accent-color);
}

.color-swatch {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 4px;
}

.color-swatch.white {
  background: #ffffff;
  border: 1px solid #eee;
}

.color-swatch.black {
  background: #000000;
}

.color-swatch.gray {
  background: #666666;
}

.custom-color {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 10px;
}

.custom-color input[type="color"] {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  padding: 0;
}

.custom-color span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Range Container */
.range-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.range-container input[type="range"] {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--border-color);
  appearance: none;
  cursor: pointer;
}

.range-container input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
}

.range-container span {
  font-size: 0.85rem;
  color: var(--text-secondary);
  min-width: 45px;
}

/* Position Options */
.position-options {
  display: flex;
  gap: 8px;
}

.position-btn {
  padding: 8px 20px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.position-btn:hover,
.position-btn.active {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Font Select */
select {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
}

select:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* EXIF Info */
.exif-info {
  background: var(--bg-color);
  border-radius: 8px;
  padding: 12px;
  font-size: 0.85rem;
}

.exif-placeholder {
  color: var(--text-secondary);
  text-align: center;
  font-style: italic;
}

.exif-info .exif-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid var(--border-color);
}

.exif-info .exif-row:last-child {
  border-bottom: none;
}

.exif-info .exif-label {
  color: var(--text-secondary);
}

.exif-info .exif-value {
  font-weight: 500;
}

/* Download Buttons */
.download-buttons {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.download-btn {
  flex: 1;
  padding: 14px 20px;
  border: none;
  border-radius: 10px;
  background: var(--accent-color);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.download-btn:hover {
  background: #0773c5;
  transform: translateY(-1px);
}

.download-btn.secondary {
  background: var(--secondary-color);
}

.download-btn.secondary:hover {
  background: #4a5568;
}

/* Reset Button */
.reset-btn {
  width: 100%;
  margin-top: 12px;
  padding: 12px;
  border: 2px solid var(--border-color);
  border-radius: 10px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.reset-btn:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

/* Utility */
.hidden {
  display: none !important;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 40px;
  padding: 20px;
  color: #a89f95;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 600px) {
  .container {
    padding: 15px;
  }

  header h1 {
    font-size: 1.6rem;
  }

  .dropzone {
    padding: 40px 15px;
  }

  .download-buttons {
    flex-direction: column;
  }

  .color-options {
    flex-wrap: wrap;
  }
}