:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #fafafa;
  --muted: #555;
  --accent: #2864c7;
  --border: #d5d5d5;
  --drop-bg: #ffffff;
  --drop-bg-active: #e8f1ff;
  --code-bg: #ececec;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #f0f0f0;
    --bg: #14161a;
    --muted: #aaa;
    --accent: #79a8ff;
    --border: #2a2d33;
    --drop-bg: #1d2025;
    --drop-bg-active: #243250;
    --code-bg: #22252b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.5;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

header h1 {
  margin: 0 0 0.5rem;
  font-size: 1.6rem;
}

header p {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

code {
  background: var(--code-bg);
  padding: 0.05rem 0.3rem;
  border-radius: 3px;
  font-size: 0.95em;
}

.drop {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 2.5rem 1rem;
  text-align: center;
  background: var(--drop-bg);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

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

.drop.dragging {
  background: var(--drop-bg-active);
  border-color: var(--accent);
}

.config {
  margin-top: 1.5rem;
  display: grid;
  gap: 0.85rem;
}

.config label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.config label.checkbox {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.config input[type="text"] {
  font: inherit;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--drop-bg);
  color: var(--fg);
}

.config input[type="text"]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.status {
  margin: 1.5rem 0 0.5rem;
  min-height: 1.5em;
  color: var(--muted);
}

.download {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  background: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
}

.log {
  margin: 1.5rem 0 0;
  padding: 0.75rem;
  background: var(--code-bg);
  border-radius: 6px;
  font-size: 0.85rem;
  white-space: pre-wrap;
  overflow-x: auto;
  min-height: 0;
}

.log:empty {
  display: none;
}

footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--muted);
}

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