@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600&display=swap');

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

:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --border: #1e1e1e;
  --border-hover: #333;
  --text: #e0e0e0;
  --text-dim: #666;
  --text-hover: #ffffff;
  --accent: #e0e0e0;
  --accent-hover: #ffffff;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  font-weight: 300;
  min-height: 100vh;
  letter-spacing: 0.02em;
  overflow-x: hidden;
}

/* Nav */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 24px 40px;
  display: flex;
  justify-content: flex-end;
  gap: 24px;
  background: transparent;
}

nav a {
  color: var(--text);
  text-decoration: none;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 300;
  font-size: 14px;
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
}

nav a:hover {
  color: var(--text-hover);
}

nav a.active {
  color: var(--text-dim);
  pointer-events: none;
}

/* Main layout */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 120px 32px 80px;
}

h1 {
  font-size: 32px;
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 48px;
}

/* Upload zones */
.upload-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.upload-zone {
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.3s, background 0.3s;
  position: relative;
  overflow: hidden;
}

.upload-zone:hover {
  border-color: var(--border-hover);
  background: rgba(255, 255, 255, 0.02);
}

.upload-zone.active {
  border-color: var(--accent);
  border-style: solid;
}

.upload-zone.dragover {
  border-color: var(--text-hover);
  background: rgba(255, 255, 255, 0.04);
}

.upload-zone .icon {
  font-size: 28px;
  margin-bottom: 12px;
  opacity: 0.4;
}

.upload-zone .label {
  font-size: 14px;
  font-weight: 400;
  margin-bottom: 4px;
}

.upload-zone .hint {
  font-size: 12px;
  color: var(--text-dim);
}

.upload-zone .filename {
  font-size: 12px;
  color: var(--accent);
  margin-top: 8px;
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
}

.upload-zone input {
  display: none;
}

/* Preview area */
.preview-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  margin-bottom: 40px;
}

.preview-frame {
  width: 280px;
  height: 280px;
  background: #000;
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
  overflow: hidden;
}

.preview-frame.bg-white {
  background: #fff;
}

.vinyl-preview {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: var(--surface);
  border: none;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vinyl-preview.spinning {
  animation: spin 1.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.vinyl-preview img:not(.mockup-overlay) {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.vinyl-preview .mockup-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  mix-blend-mode: soft-light;
  opacity: 0;
  pointer-events: none;
  z-index: 1;
  transition: opacity 0.3s;
}

.vinyl-preview .mockup-overlay.visible {
  opacity: 1;
}

.vinyl-preview .spindle-hole {
  position: absolute;
  width: 21px;
  height: 21px;
  border-radius: 50%;
  background: var(--bg);
  z-index: 2;
  transition: background 0.3s;
}

.vinyl-preview .placeholder-text {
  font-size: 12px;
  color: var(--text-dim);
}

/* Audio player */
.player-controls {
  display: none;
  align-items: center;
  gap: 16px;
  width: 100%;
  max-width: 360px;
}

.player-controls.visible {
  display: flex;
}

.play-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.3s, background 0.3s;
}

.play-btn:hover {
  border-color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.play-btn svg {
  width: 14px;
  height: 14px;
  fill: var(--text);
}

.player-track {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.player-seek {
  width: 100%;
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  cursor: pointer;
  position: relative;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
}

.player-seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text);
  cursor: pointer;
  margin-top: -3px;
}

.player-seek::-webkit-slider-runnable-track {
  height: 2px;
  background: linear-gradient(to right, var(--text) var(--seek-progress, 0%), var(--border) var(--seek-progress, 0%));
  border-radius: 1px;
}

.player-time {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-dim);
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
}

/* Options */
.options-row {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 140px;
}

.option-group label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.option-group select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 6px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 300;
  cursor: pointer;
  transition: border-color 0.3s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.option-group select:hover {
  border-color: var(--border-hover);
}

/* Custom mockup upload */
.custom-mockup-upload {
  background: var(--surface);
  border: 1px dashed var(--border);
  color: var(--text-dim);
  padding: 10px 12px;
  border-radius: 6px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 300;
  cursor: pointer;
  transition: border-color 0.3s;
  text-align: center;
}

.custom-mockup-upload:hover {
  border-color: var(--border-hover);
}

.custom-mockup-upload.active {
  border-style: solid;
  border-color: var(--accent);
  color: var(--text);
}

.custom-mockup-upload input {
  display: none;
}

/* Generate button */
.generate-btn {
  width: 100%;
  padding: 14px;
  background: var(--text);
  color: var(--bg);
  border: none;
  border-radius: 6px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: opacity 0.3s, transform 0.15s;
}

.generate-btn:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
}

.generate-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Progress */
.progress-section {
  margin-top: 24px;
  display: none;
}

.progress-section.visible {
  display: block;
}

.progress-bar-container {
  width: 100%;
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-bar {
  height: 100%;
  background: var(--text);
  width: 0%;
  transition: width 0.5s ease;
}

.progress-label {
  font-size: 12px;
  color: var(--text-dim);
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
}

/* Result preview */
.result-preview {
  display: none;
  justify-content: center;
  margin-top: 20px;
}

.result-preview.visible {
  display: flex;
}

.result-preview img,
.result-preview video {
  max-width: 100%;
  width: 360px;
  height: 360px;
  border-radius: 8px;
  object-fit: contain;
  background: #000;
}

/* Download button */
.download-btn {
  display: none;
  width: 100%;
  padding: 14px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.3s, background 0.3s;
  margin-top: 16px;
  text-decoration: none;
  text-align: center;
}

.download-btn.visible {
  display: block;
}

.download-btn:hover {
  border-color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

/* Error */
.error-msg {
  color: #cc4444;
  font-size: 13px;
  margin-top: 12px;
  display: none;
}

.error-msg.visible {
  display: block;
}

/* Footer */
footer {
  text-align: center;
  padding: 40px 32px;
  font-size: 12px;
  color: var(--text-dim);
}

footer a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover {
  color: var(--text-hover);
}

/* Mobile */
@media (max-width: 600px) {
  nav { padding: 18px 20px; }
  .container { padding: 100px 20px 40px; }
  h1 { font-size: 24px; }
  .upload-grid { grid-template-columns: 1fr; }
  .preview-frame { width: 220px; height: 220px; }
  .vinyl-preview { width: 220px; height: 220px; }
  footer { padding: 32px 20px; }
}