:root {
  color-scheme: dark;
  --bg: #0e1117;
  --fg: #fafafa;
  --muted: #9aa0a6;
  --accent: #4f8cff;
  --border: #2a2f3a;
  --danger: #ff6b6b;
}

* { box-sizing: border-box; }

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

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.subtitle { color: var(--muted); margin-bottom: 2rem; }

.upload-box {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1.25rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: #161a23;
}

input[type="file"] { color: var(--fg); flex: 1; }

button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  cursor: pointer;
}

button:disabled { opacity: 0.5; cursor: not-allowed; }
button:hover:not(:disabled) { filter: brightness(1.1); }

#status { color: var(--muted); min-height: 1.5rem; }
#status.error { color: var(--danger); }

.results { margin-top: 2rem; }
.results.hidden { display: none; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

th { background: #161a23; }

#downloadBtn { margin-top: 1.5rem; }
#downloadBtn.hidden { display: none; }