:root {
  color-scheme: light dark;
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --warn-bg: #fef3c7;
  --warn-fg: #92400e;
  --success-bg: #d1fae5;
  --success-fg: #065f46;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #f3f4f6;
    --muted: #9ca3af;
    --border: #2a2f3a;
    --accent: #3b82f6;
    --accent-fg: #ffffff;
    --warn-bg: #422006;
    --warn-fg: #fcd34d;
    --success-bg: #064e3b;
    --success-fg: #a7f3d0;
  }
}

* {
  box-sizing: border-box;
}

html,
body,
#root {
  height: 100%;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Segoe UI', Roboto, 'Helvetica Neue',
    'Malgun Gothic', sans-serif;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
}

.app {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 24px 32px;
}

header {
  width: 100%;
  max-width: 720px;
  margin-bottom: 32px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

header p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

main {
  width: 100%;
  max-width: 720px;
  flex: 1;
}

.dropzone {
  display: block;
  width: 100%;
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 64px 24px;
  text-align: center;
  background: transparent;
  transition:
    border-color 120ms,
    background 120ms;
  cursor: pointer;
}

.dropzone:hover,
.dropzone.active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.dropzone.busy {
  cursor: progress;
  opacity: 0.7;
  pointer-events: none;
}

.dropzone h2 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 600;
}

.dropzone p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.dropzone .hint {
  margin-top: 16px;
  font-size: 12px;
  color: var(--muted);
}

.dropzone input[type='file'] {
  display: none;
}

.status {
  margin-top: 24px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: color-mix(in srgb, var(--fg) 3%, transparent);
}

.status h2 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
}

.status .progress-track {
  height: 8px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
  margin: 12px 0 8px;
}

.status .progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 120ms ease-out;
}

.status .progress-label {
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 16px;
}

button.primary {
  background: var(--accent);
  color: var(--accent-fg);
  border: none;
  border-radius: 10px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

button.primary:hover {
  filter: brightness(1.05);
}

button.link {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 14px;
  cursor: pointer;
  padding: 8px 4px;
}

button.link:hover {
  text-decoration: underline;
}

.warn,
.success,
.error {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.6;
}

.warn {
  background: var(--warn-bg);
  color: var(--warn-fg);
}

.success {
  background: var(--success-bg);
  color: var(--success-fg);
}

.error {
  background: #fee2e2;
  color: #991b1b;
}

@media (prefers-color-scheme: dark) {
  .error {
    background: #450a0a;
    color: #fca5a5;
  }
}

footer {
  margin-top: 48px;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  line-height: 1.6;
}

footer a {
  color: var(--muted);
}

.stats {
  display: flex;
  gap: 24px;
  margin-top: 8px;
  font-size: 14px;
  color: var(--muted);
}

.stats strong {
  color: var(--fg);
  font-weight: 600;
  margin-right: 4px;
}