:root {
  --bg-main: #f7f6f2;
  --bg-card: #ffffff;
  --bg-sidebar: #fbfbf9;
  --primary: #b84e32;
  --primary-hover: #a13f26;
  --primary-light: #fdeee7;
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --text-hint: #9ca3af;
  --border-light: #e5e4de;
  --border-hover: #d2d0c7;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* 滚动条优化 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: #d6d3c9;
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: #bab6ab;
}

/* 拍照取景框与扫描仪样式 */
.camera-overlay-box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.55);
  border-radius: 12px;
  pointer-events: none;
  transition: width 0.2s ease, height 0.2s ease;
}

.camera-corner {
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: #b84e32;
  border-style: solid;
}
.camera-corner-tl { top: -2px; left: -2px; border-width: 3px 0 0 3px; border-top-left-radius: 10px; }
.camera-corner-tr { top: -2px; right: -2px; border-width: 3px 3px 0 0; border-top-right-radius: 10px; }
.camera-corner-bl { bottom: -2px; left: -2px; border-width: 0 0 3px 3px; border-bottom-left-radius: 10px; }
.camera-corner-br { bottom: -2px; right: -2px; border-width: 0 3px 3px 0; border-bottom-right-radius: 10px; }

/* 扫描动效线 */
.scanner-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #b84e32, transparent);
  box-shadow: 0 0 8px #b84e32;
  animation: scan-move 2.2s infinite ease-in-out;
}

@keyframes scan-move {
  0% { top: 4px; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { top: calc(100% - 6px); opacity: 0; }
}

/* 高清试卷图片优化渲染 */
.img-question-hd {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  backface-visibility: hidden;
  transform: translateZ(0);
}

/* 按钮微动效 */
.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  transition: all 0.15s ease-in-out;
}
.btn-primary:hover {
  background-color: var(--primary-hover);
}
.btn-primary:active {
  transform: scale(0.98);
}

/* 胶囊标签样式 */
.tag-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  font-weight: 500;
  line-height: 1.25;
}

/* 卡片阴影微调 */
.card-soft {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02), 0 1px 2px rgba(0, 0, 0, 0.03);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.card-soft:hover {
  border-color: var(--border-hover);
}

/* 打印试卷样式 */
@media print {
  body {
    background-color: #ffffff !important;
  }
  .no-print {
    display: none !important;
  }
  .print-only {
    display: block !important;
  }
  .card-soft {
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    page-break-inside: avoid;
    break-inside: avoid;
    margin-bottom: 2rem;
  }
}