:root {
  --bg: #0f1115;
  --panel: #171a21;
  --border: #2a2e38;
  --text: #e8eaed;
  --muted: #9aa0ac;
  --accent: #5b8cff;
  --accent-text: #ffffff;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f8;
    --panel: #ffffff;
    --border: #e0e2e8;
    --text: #1a1c22;
    --muted: #5b6270;
    color-scheme: light;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.page-header {
  padding: 2.5rem 1.5rem 1rem;
  text-align: center;
}

.page-header h1 {
  margin: 0 0 0.4rem;
  font-size: 2rem;
}

.page-header p {
  margin: 0;
  color: var(--muted);
}

.layout {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem;
  display: grid;
  gap: 1.5rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  border: 2px dashed var(--border);
  border-radius: 10px;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.dropzone.dragging {
  border-color: var(--accent);
}

.dropzone #preview {
  max-width: 100%;
  max-height: 320px;
  object-fit: contain;
}

#dropzone-text {
  color: var(--muted);
  padding: 1rem;
  text-align: center;
}

.style-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}

.style-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem;
  color: var(--text);
  cursor: pointer;
  font: inherit;
}

.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

.before-after figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.before-after img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}

.before-after figcaption {
  text-align: center;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.style-card strong {
  font-size: 0.95rem;
}

.style-card span {
  font-size: 0.8rem;
  color: var(--muted);
}

.style-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

#generate-btn {
  width: 100%;
  padding: 0.85rem;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

#generate-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  min-height: 1.2em;
  color: var(--muted);
  font-size: 0.9rem;
}

.result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.result img {
  max-width: 100%;
  border-radius: 10px;
}

.result a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.page-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 1rem 1.5rem 2.5rem;
}