:root {
  --bg: #faf7f2;
  --surface: #ffffff;
  --text: #2b2622;
  --muted: #6f665e;
  --border: #e6ded3;
  --accent: #e0673a;
  --accent-text: #ffffff;
  --paper: #ffffff;
  --shadow: 0 1px 3px rgb(0 0 0 / 0.06), 0 4px 16px rgb(0 0 0 / 0.04);
  --radius: 14px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1917;
    --surface: #25221f;
    --text: #efe9e2;
    --muted: #a89f95;
    --border: #3a3531;
    --accent: #f0845a;
    --shadow: none;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 16px 64px;
}

.site-header {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 16px 24px;
}
.site-header h1 {
  margin: 0 0 4px;
  font-size: 2rem;
}
.site-header p {
  margin: 0;
  color: var(--muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Upload */
.upload-card {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 24px;
  padding: 20px;
}
@media (max-width: 700px) {
  .upload-card {
    grid-template-columns: 1fr;
  }
}

.dropzone {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
  border: 2px dashed var(--border);
  border-radius: 10px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  overflow: hidden;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover,
.dropzone.dragging {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}
.dropzone strong {
  color: var(--accent);
}
.dropzone img {
  max-width: 100%;
  max-height: 360px;
  display: block;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.controls label {
  font-weight: 600;
}
select,
button {
  font: inherit;
}
select {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.hint {
  margin: 0 0 8px;
  font-size: 0.875rem;
  color: var(--muted);
}

button {
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
}
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  padding: 12px 18px;
  font-weight: 600;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  min-height: 1.5em;
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}
.status.error {
  color: #d63c3c;
}

/* Guide */
#guide {
  margin-top: 32px;
}

.summary {
  padding: 20px;
  margin-bottom: 24px;
}
.summary h2 {
  margin: 0 0 4px;
}
.meta {
  margin: 0 0 16px;
  color: var(--muted);
}
.summary h4 {
  margin: 12px 0 6px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  margin: 0;
  list-style: none;
}
.chips li {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.875rem;
}
.swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: -2px;
  border: 1px solid rgb(0 0 0 / 0.15);
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.step {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  padding: 16px;
}
@media (max-width: 700px) {
  .step {
    grid-template-columns: 1fr;
  }
}

.step-image {
  position: relative;
  aspect-ratio: 1;
  border-radius: 10px;
  background: var(--paper);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: #8a8178;
  text-align: center;
  font-size: 0.9rem;
}
.step-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.step-image .placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px;
}
.step-image .error {
  color: #d63c3c;
}
.step-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.step-actions a,
.step-actions button {
  font-size: 0.85rem;
  padding: 6px 12px;
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid #e6ded3;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.step-number {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}
.step-title {
  margin: 2px 0 10px;
  font-size: 1.35rem;
}
.step-instructions {
  margin: 0;
  padding-left: 20px;
}
.step-instructions li {
  margin-bottom: 6px;
}
.step-instructions .loading {
  color: var(--muted);
  list-style: none;
  margin-left: -20px;
}
.step-tip {
  margin: 14px 0 0;
  padding: 10px 12px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  font-size: 0.925rem;
}

/* API key */
.key-card {
  padding: 16px 20px;
  margin-bottom: 16px;
}
.key-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}
.key-row {
  display: flex;
  gap: 8px;
}
.key-row input {
  flex: 1;
  min-width: 0;
  font: inherit;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.key-form .hint {
  margin: 8px 0 0;
}
.hint a {
  color: var(--accent);
}
.key-saved {
  margin: 0;
}
button.link {
  border: none;
  background: none;
  padding: 0;
  color: var(--accent);
  text-decoration: underline;
}