:root {
  color-scheme: light;
  /* 与主应用一致的品牌蓝扁平体系（不透明白面 + 克制阴影，去玻璃拟态） */
  --quiz-bg: #f0f2f5;
  --quiz-surface: #ffffff;
  --quiz-surface-strong: #ffffff;
  --quiz-border: #e4e7ec;
  --quiz-text: #0f172a;
  --quiz-text-secondary: #475569;
  --quiz-text-tertiary: #94a3b8;
  --quiz-primary: #2563eb;
  --quiz-primary-hover: #1d4ed8;
  --quiz-success: #22c55e;
  --quiz-warning: #f59e0b;
  --quiz-danger: #f43f5e;
  --quiz-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 58%, #3b82f6 100%);
  --quiz-shadow: 0 4px 16px rgba(15, 23, 42, 0.10), 0 1px 3px rgba(15, 23, 42, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--quiz-text);
  background:
    radial-gradient(at 40% 20%, rgba(37, 99, 235, 0.07) 0px, transparent 50%),
    radial-gradient(at 80% 0%, rgba(59, 130, 246, 0.05) 0px, transparent 50%),
    radial-gradient(at 0% 50%, rgba(37, 99, 235, 0.05) 0px, transparent 50%),
    linear-gradient(180deg, #f8fafc 0%, var(--quiz-bg) 100%);
  background-attachment: fixed;
}

button {
  font: inherit;
}

.quiz-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.quiz-panel {
  width: min(560px, 100%);
}

.quiz-card {
  padding: 28px;
  border: 1px solid var(--quiz-border);
  border-radius: 20px;
  background: var(--quiz-surface-strong);
  box-shadow: var(--quiz-shadow);
}

.quiz-meta {
  margin: 0 0 16px;
  color: var(--quiz-text-secondary);
  font-size: 14px;
  line-height: 1.8;
  text-align: center;
}

.quiz-prompt {
  margin: 0;
  text-align: center;
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.quiz-options {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.quiz-option-button,
.quiz-primary-button,
.quiz-secondary-button {
  min-height: 48px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.quiz-option-button {
  width: 100%;
  padding: 0 18px;
  background: #ffffff;
  border-color: var(--quiz-border);
  color: var(--quiz-text);
  font-size: 17px;
  font-weight: 600;
}

.quiz-option-button:hover,
.quiz-option-button:focus-visible {
  border-color: var(--quiz-primary);
  background: rgba(239, 246, 255, 0.95);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.06);
  color: var(--quiz-primary-hover);
  outline: none;
}

.quiz-option-button:disabled,
.quiz-primary-button:disabled,
.quiz-secondary-button:disabled {
  opacity: 0.58;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.quiz-primary-button,
.quiz-secondary-button {
  min-width: 120px;
  padding: 0 18px;
  font-weight: 600;
}

.quiz-primary-button {
  background: var(--quiz-gradient);
  color: #ffffff;
  box-shadow: none;
}

.quiz-primary-button:hover,
.quiz-primary-button:focus-visible {
  box-shadow: none;
  outline: none;
}

.quiz-secondary-button {
  background: rgba(255, 255, 255, 0.98);
  color: var(--quiz-text);
  border-color: var(--quiz-border);
}

.quiz-secondary-button:hover,
.quiz-secondary-button:focus-visible {
  border-color: var(--quiz-primary);
  color: var(--quiz-primary-hover);
  outline: none;
}

/* 系统提示：与主页面一致的右上角滑入式卡片（左侧色条 + 图标 + 进度条 + 关闭） */
.message-stack {
  position: fixed;
  top: 16px;
  right: 16px;
  left: auto;
  z-index: 9999;
  display: grid;
  gap: 12px;
  width: min(380px, calc(100vw - 24px));
  pointer-events: none;
}

.message-toast {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 13px 14px 13px 15px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  border-left: 4px solid var(--quiz-primary);
  border-radius: 12px;
  background: var(--quiz-surface-strong);
  box-shadow: var(--quiz-shadow);
  color: var(--quiz-text);
  overflow: hidden;
  pointer-events: auto;
  opacity: 0;
  transform: translateX(18px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.message-toast.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.message-icon {
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  color: var(--quiz-primary);
}

.message-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.message-icon .message-spinner {
  animation: message-spin 800ms linear infinite;
}

.message-text {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  padding-top: 1px;
  font-size: 13.5px;
  line-height: 1.55;
  font-weight: 500;
  color: var(--quiz-text);
  word-break: break-word;
}

.message-close {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin: -1px -2px 0 0;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--quiz-text-tertiary);
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

.message-close svg {
  width: 14px;
  height: 14px;
}

.message-close:hover,
.message-close:focus-visible {
  background: rgba(15, 23, 42, 0.06);
  color: var(--quiz-text);
  outline: none;
}

.message-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  transform-origin: left center;
  background: var(--quiz-primary);
  opacity: 0.85;
}

.message-toast[data-state="success"] { border-left-color: var(--quiz-success); }
.message-toast[data-state="success"] .message-icon { color: var(--quiz-success); }
.message-toast[data-state="success"] .message-progress { background: var(--quiz-success); }

.message-toast[data-state="error"] { border-left-color: var(--quiz-danger); }
.message-toast[data-state="error"] .message-icon { color: var(--quiz-danger); }
.message-toast[data-state="error"] .message-progress { background: var(--quiz-danger); }

.message-toast[data-state="warning"] { border-left-color: var(--quiz-warning); }
.message-toast[data-state="warning"] .message-icon { color: var(--quiz-warning); }
.message-toast[data-state="warning"] .message-progress { background: var(--quiz-warning); }

.message-toast[data-state="info"] .message-icon,
.message-toast[data-state="loading"] .message-icon { color: var(--quiz-primary); }
.message-toast[data-state="info"] .message-progress { background: var(--quiz-primary); }

.quiz-modal-shell[hidden] {
  display: none !important;
}

.quiz-modal-shell {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 20px;
}

.quiz-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.32);
}

.quiz-modal-panel {
  position: relative;
  z-index: 1;
  width: min(420px, 100%);
  padding: 24px;
  border: 1px solid var(--quiz-border);
  border-radius: 20px;
  background: var(--quiz-surface-strong);
  box-shadow: var(--quiz-shadow);
}

.quiz-countdown {
  --countdown-progress: 1;
  position: absolute;
  top: 12px;
  right: 18px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background:
    conic-gradient(
      from -90deg,
      var(--quiz-primary) calc(var(--countdown-progress) * 360deg),
      rgba(37, 99, 235, 0.14) 0deg
    );
  box-shadow:
    inset 0 0 0 1px rgba(37, 99, 235, 0.16),
    0 8px 22px rgba(37, 99, 235, 0.16);
}

.quiz-countdown::before {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: inherit;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.1);
}

.quiz-countdown-value {
  position: relative;
  z-index: 1;
  color: var(--quiz-primary-hover);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.quiz-modal-title {
  margin: 0;
  font-size: 22px;
  line-height: 1.2;
  padding-right: 58px;
}

.quiz-modal-copy {
  margin: 14px 0 0;
  color: var(--quiz-text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

.quiz-modal-actions {
  margin-top: 22px;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .quiz-shell {
    padding: 16px;
  }

  .quiz-card {
    padding: 20px;
    border-radius: 18px;
  }

  .quiz-prompt {
    font-size: clamp(26px, 8.4vw, 32px);
  }

  .quiz-option-button {
    min-height: 52px;
    font-size: 16px;
  }

  .message-stack {
    top: 12px;
    right: 12px;
    left: auto;
    width: min(100vw - 24px, 380px);
  }

  .message-toast {
    padding: 12px 13px;
    border-radius: 12px;
  }

  .message-text {
    font-size: 13px;
  }

  .quiz-modal-panel {
    padding: 20px;
    border-radius: 18px;
  }

  .quiz-countdown {
    top: 10px;
    right: 14px;
    width: 40px;
    height: 40px;
  }

  .quiz-modal-title {
    padding-right: 54px;
  }

  .quiz-modal-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .quiz-primary-button,
  .quiz-secondary-button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

@keyframes message-spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes message-progress-shrink {
  from { transform: scaleX(1); }
  to { transform: scaleX(0); }
}

/* 旗帜语言下拉（与 app 顶栏同款，门禁页固定右上角）。开合逻辑在 i18n.js。 */
.lang-switch {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 50;
}

.lang-switch-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--quiz-border);
  background: var(--quiz-surface-strong);
  color: var(--quiz-text);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}

.lang-switch-trigger:hover,
.lang-switch-trigger:focus-visible {
  border-color: var(--quiz-primary);
  outline: none;
}

.lang-switch .lang-flag {
  font-size: 18px;
  line-height: 1;
}

.lang-switch-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--quiz-text-secondary);
  line-height: 1;
}

.lang-switch-chevron {
  width: 14px;
  height: 14px;
  color: var(--quiz-text-tertiary);
}

.lang-switch-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 80;
  margin: 0;
  padding: 6px;
  list-style: none;
  min-width: 150px;
  border: 1px solid var(--quiz-border);
  border-radius: 12px;
  background: var(--quiz-surface-strong);
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
}

.lang-switch-menu li {
  list-style: none;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--quiz-text);
  font-size: 14px;
  cursor: pointer;
  text-align: left;
}

.lang-option:hover {
  background: rgba(37, 99, 235, 0.12);
}

.lang-option.is-active {
  background: rgba(37, 99, 235, 0.16);
  font-weight: 700;
}

@media (max-width: 480px) {
  .lang-switch {
    top: 12px;
    right: 12px;
  }
  .lang-switch-label {
    display: none;
  }
}