@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&family=Inter:wght@400;600;700&display=swap');

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

:root {
  --bg: #0f0f1a;
  --card: #1a1a2e;
  --card-hover: #22223a;
  --accent: #e94560;
  --accent-hover: #ff6b81;
  --accent2: #0f3460;
  --text: #eee;
  --text-dim: #888;
  --border: #2a2a4a;
  --success: #16c79a;
  --radius: 12px;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(233, 69, 96, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(15, 52, 96, 0.1) 0%, transparent 50%);
}

.container {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

header {
  text-align: center;
}

.title {
  font-family: 'Press Start 2P', monospace;
  font-size: 1.4rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  line-height: 1.6;
}

.pixel-icon {
  display: inline-block;
  font-size: 1.2rem;
  animation: blink 1.2s steps(2, start) infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  50%, 100% { opacity: 0.3; }
}

.subtitle {
  color: var(--text-dim);
  margin-top: 0.5rem;
  font-size: 0.9rem;
}

.card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.upload-area {
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.upload-area.dragover {
  border-color: var(--accent);
  background: var(--card-hover);
}

.upload-placeholder {
  text-align: center;
  color: var(--text-dim);
}

.upload-icon {
  color: var(--accent);
  margin-bottom: 1rem;
  opacity: 0.7;
}

.browse-link {
  color: var(--accent);
  cursor: pointer;
  font-weight: 600;
  text-decoration: underline;
}

.formats {
  display: block;
  font-size: 0.75rem;
  margin-top: 0.5rem;
  color: var(--text-dim);
  opacity: 0.6;
}

.preview-img {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
  object-fit: contain;
}

.hidden {
  display: none !important;
}

.controls {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.control-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
  display: block;
}

.toggle-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.toggle-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dim);
  transition: color 0.2s;
}

.toggle-label.active {
  color: var(--text);
}

.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 26px;
  transition: 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  bottom: 3px;
  background: var(--text);
  border-radius: 50%;
  transition: 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--accent);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

.color-buttons {
  display: flex;
  gap: 0.5rem;
}

.color-btn {
  flex: 1;
  padding: 0.6rem 0.5rem;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: all 0.2s;
}

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

.color-btn.active {
  border-color: var(--accent);
  background: rgba(233, 69, 96, 0.1);
}

.color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.color-dot.color {
  background: linear-gradient(135deg, #e94560, #f5a623, #16c79a, #0f3460);
}

.color-dot.gray {
  background: linear-gradient(135deg, #333, #999);
}

.color-dot.bw {
  background: linear-gradient(135deg, #000, #fff);
}

.color-dot.gameboy {
  background: linear-gradient(135deg, #9bbc0f, #8bac0f, #306230, #0f380f);
}

.convert-btn {
  width: 100%;
  padding: 1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-family: 'Press Start 2P', monospace;
  font-size: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}

.convert-btn:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.convert-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.result-area {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.result-title {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.7rem;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--success);
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.result-panel {
  text-align: center;
}

.panel-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.result-img {
  width: 100%;
  border-radius: 8px;
  image-rendering: pixelated;
  border: 2px solid var(--border);
}

.download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.75rem;
  background: var(--accent2);
  color: var(--text);
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.download-btn:hover {
  background: #1a4a8a;
}

footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.7rem;
  padding-top: 1rem;
  opacity: 0.5;
}

.footer-brand {
  margin-bottom: 0.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.7rem;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  transition: all 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
  background: rgba(233, 69, 96, 0.1);
}

@media (max-width: 480px) {
  .title {
    font-size: 1rem;
  }
  .result-grid {
    grid-template-columns: 1fr;
  }
}