/* 上下文：主題色彩變更為淺色／白底 */
:root {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --accent-color: #2563eb;
  --text-main: #0f172a;
  --text-sub: #64748b;
  --border-color: #e2e8f0;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 480px;
  padding: 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.hidden {
  display: none !important;
}

.form-group {
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 6px;
}

input[type="text"], input[type="file"] {
  width: 100%;
  padding: 10px;
  background: #f1f5f9;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  box-sizing: border-box;
}

.btn-group {
  display: flex;
  gap: 10px;
}

.btn {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn.primary {
  background: var(--accent-color);
  color: #ffffff;
}

.btn.secondary {
  background: #e2e8f0;
  color: var(--text-main);
}

.status-bar {
  text-align: center;
  padding: 8px;
  border-radius: 6px;
  background: #e2e8f0;
  color: var(--text-main);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.progress-bar-bg {
  width: 100%;
  height: 12px;
  background: #e2e8f0;
  border-radius: 6px;
  overflow: hidden;
  margin: 12px 0 6px 0;
}

.progress-bar-fill {
  width: 0%;
  height: 100%;
  background: var(--accent-color);
  transition: width 0.1s linear;
}

.info-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--text-sub);
}

.percent-text {
  text-align: right;
  font-size: 0.85rem;
  color: var(--text-sub);
}