:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --fg: #1c1c1e;
  --card: #ffffff;
  --border: #dcdce0;
  --accent: #3a6df0;
  --error: #d33;
  --done: #1a8a3d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121214;
    --fg: #ececec;
    --card: #1c1c1f;
    --border: #303034;
    --accent: #6a93ff;
    --error: #ff6b6b;
    --done: #4ade80;
  }
}

* { box-sizing: border-box; }

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

main { max-width: 840px; margin: 0 auto; padding: 2rem 1rem; }

header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; }

h1 { margin: 0; font-size: 1.5rem; }

.subtitle { opacity: 0.6; margin-top: -0.5rem; }

.upload-box, table {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}

.upload-box form { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; }

input[type="file"], input[type="password"] {
  flex: 1;
  min-width: 200px;
  padding: 0.5rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
}

button {
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: white;
  cursor: pointer;
  font-weight: 600;
}

button.link {
  background: none;
  color: var(--accent);
  font-weight: 400;
  padding: 0;
  text-decoration: underline;
}

table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; }

th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid var(--border); font-size: 0.9rem; }

tr.status-error td:nth-child(2) { color: var(--error); font-weight: 600; }
tr.status-done td:nth-child(2) { color: var(--done); font-weight: 600; }

.progress-bar {
  width: 100%;
  min-width: 140px;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.6s ease;
}

.progress-label {
  margin-top: 0.25rem;
  font-size: 0.8rem;
  opacity: 0.75;
}

.login-box {
  max-width: 340px;
  margin: 4rem auto;
  text-align: center;
}

.login-box form { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1.5rem; }

.error { color: var(--error); margin-top: 1rem; }

#upload-status { opacity: 0.7; font-size: 0.9rem; }