:root {
  --bg: #0e1219;
  --card: #161b26;
  --text: #e7ecf2;
  --muted: #7f8896;
  --accent: #5cd96f;
  --border: #242a36;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}
main {
  max-width: 480px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}
h1 {
  font-size: 1.4rem;
  margin: 0 0 0.25rem;
  letter-spacing: 0.5px;
  color: var(--accent);
}
h2 {
  font-size: 1.1rem;
  margin: 0 0 1.5rem;
  font-weight: 600;
}
.subtitle {
  color: var(--muted);
  margin: -0.75rem 0 1.5rem;
  font-size: 0.9rem;
}
form { display: flex; flex-direction: column; gap: 1rem; }
label {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: -0.5rem;
}
select, input[type=file], button {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  font-size: 1rem;
  font-family: inherit;
}
select:focus, input[type=file]:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
button {
  background: var(--accent);
  color: #0e1219;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
}
button:disabled { opacity: 0.6; cursor: not-allowed; }
.meta { color: var(--muted); font-size: 0.9rem; }
code {
  background: var(--card);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85rem;
}
a { color: var(--accent); }
#status { color: var(--muted); font-size: 0.9rem; min-height: 1.25rem; }