:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666666;
  --border: #d0d0d0;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --ok: #15803d;
  --err: #b91c1c;
  --card: #f6f6f6;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #ececec;
    --muted: #9a9a9a;
    --border: #3a3a3a;
    --accent: #60a5fa;
    --accent-fg: #0b0b0b;
    --ok: #4ade80;
    --err: #f87171;
    --card: #1e1e1e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px;
}

label { display: block; font-weight: 600; margin-bottom: 8px; }

.picker input[type="file"] {
  width: 100%;
  padding: 12px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--fg);
}

.hint { color: var(--muted); font-size: 14px; }

button {
  padding: 10px 20px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }

#results { list-style: none; padding: 0; }
#results li {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 8px;
  background: var(--card);
}
#results .ok { color: var(--ok); }
#results .error { color: var(--err); }
#results pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 13px;
  margin: 8px 0 0;
}

footer {
  padding: 12px 16px;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--border);
}