/* ---------------------------------------------------------------------
   设计系统变量——统一间距/圆角/色板，方便整体调整而不用到处改数字。
   --------------------------------------------------------------------- */
:root {
  --color-bg: #f4f5f8;
  --color-surface: #ffffff;
  --color-text: #1c1f26;
  --color-text-muted: #656c7a;
  --color-text-faint: #8a90a0;
  --color-border: #e6e8ee;

  --color-primary: #3b5bdb;
  --color-primary-hover: #2f4bc4;
  --color-primary-tint: #eaefff;
  --color-primary-contrast: #ffffff;

  --color-success: #2b8a3e;
  --color-success-bg: #e6f7ea;
  --color-warning: #a6710a;
  --color-warning-bg: #fff6df;
  --color-danger: #c0392b;
  --color-danger-bg: #fdecea;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  --shadow-card: 0 1px 2px rgba(20, 24, 38, 0.04), 0 4px 12px rgba(20, 24, 38, 0.06);
  --shadow-card-hover: 0 2px 4px rgba(20, 24, 38, 0.06), 0 8px 20px rgba(20, 24, 38, 0.09);

  --transition-fast: 120ms ease;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) 64px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-1);
  color: var(--color-text);
}
h2 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: var(--space-5) 0 var(--space-2);
  color: var(--color-text);
}
.hint { color: var(--color-text-muted); font-size: 0.9rem; }
.error { color: var(--color-danger); font-weight: 500; }

a { color: var(--color-primary); }

/* 键盘可达性：所有可交互元素都要有清晰的 focus 环，不只是靠鼠标 hover。 */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------------
   选题列表
   --------------------------------------------------------------------- */
.item-list { list-style: none; padding: 0; margin: var(--space-4) 0; }
.item-link {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-4);
  margin-bottom: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.item-link:hover,
.item-link:focus-visible {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary-tint);
  transform: translateY(-1px);
}
.item-link::after {
  content: "›";
  margin-left: auto;
  color: var(--color-text-faint);
  font-size: 1.3rem;
  line-height: 1;
}
.item-tag {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
}
.item-preview {
  font-size: 0.92rem;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------------------------------------------------------------------
   题目卡片
   --------------------------------------------------------------------- */
.question-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-card);
  margin: var(--space-4) 0;
}
.question-text {
  white-space: pre-wrap;
  font-family: inherit;
  font-size: 1.05rem;
  line-height: 1.6;
  margin: var(--space-2) 0;
}

/* ---------------------------------------------------------------------
   按钮
   --------------------------------------------------------------------- */
.actions { display: flex; gap: var(--space-3); margin: var(--space-5) 0; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn:hover { border-color: var(--color-text-faint); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-contrast);
}
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-primary:disabled {
  background: #c3cdf0;
  border-color: #c3cdf0;
  color: #f0f2fc;
  cursor: not-allowed;
  transform: none;
}
.btn-secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }

/* ---------------------------------------------------------------------
   知情同意提示
   --------------------------------------------------------------------- */
.consent-box {
  background: var(--color-warning-bg);
  border: 1px solid #f0dca3;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-4) 0;
  font-size: 0.9rem;
  color: #5c4400;
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
}
.consent-box input[type="checkbox"] {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

/* ---------------------------------------------------------------------
   录音区块
   --------------------------------------------------------------------- */
.recorder-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  box-shadow: var(--shadow-card);
}
.recorder-block h2 { margin-top: 0; display: flex; align-items: center; gap: var(--space-2); }
.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-primary-tint);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}
.recorder-controls { display: flex; align-items: center; gap: var(--space-3); margin-top: var(--space-2); flex-wrap: wrap; }
.record-status { color: var(--color-text-muted); font-size: 0.9rem; display: inline-flex; align-items: center; gap: 6px; }
.preview-audio { width: 100%; margin-top: var(--space-3); }

/* 录音中的红点脉冲——recorder.js 在开始/结束录音时给 .recorder-block 加/去
   .is-recording，纯视觉反馈，不改变任何提交逻辑。 */
.record-status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-faint);
  flex-shrink: 0;
}
.is-recording .record-status { color: var(--color-danger); font-weight: 600; }
.is-recording .record-status::before {
  background: var(--color-danger);
  animation: rec-pulse 1.2s ease-in-out infinite;
}
@keyframes rec-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(1.3); }
}
@media (prefers-reduced-motion: reduce) {
  .is-recording .record-status::before { animation: none; }
}

.record-btn { border-color: #f3c8c2; color: #a52f22; }
.record-btn:hover:not(:disabled) { border-color: var(--color-danger); background: var(--color-danger-bg); }
.record-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.stop-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------------------------------------------------------------------
   取件码
   --------------------------------------------------------------------- */
.code-display {
  font-size: 2.1rem;
  letter-spacing: 5px;
  font-weight: 700;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  margin: var(--space-5) 0;
  box-shadow: var(--shadow-card);
  color: var(--color-primary);
}

/* ---------------------------------------------------------------------
   表单
   --------------------------------------------------------------------- */
.login-form, .resolve-form { display: flex; flex-direction: column; gap: var(--space-3); max-width: 380px; }
.login-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}
.login-form input,
.resolve-form textarea,
.lookup-form input {
  padding: 11px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}
.login-form input:focus,
.resolve-form textarea:focus,
.lookup-form input:focus {
  border-color: var(--color-primary);
  outline: none;
}
.resolve-form textarea { resize: vertical; line-height: 1.5; }

.lookup-form { display: flex; gap: var(--space-2); margin: var(--space-4) 0; max-width: none; }
.lookup-form input { flex: 1; }

/* ---------------------------------------------------------------------
   待批改队列
   --------------------------------------------------------------------- */
.queue-list { list-style: none; padding: 0; margin: var(--space-3) 0 var(--space-5); }
.queue-list a {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.queue-list a:hover,
.queue-list a:focus-visible {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary-tint);
}
.queue-list-done a { opacity: 0.75; }
.queue-time { color: var(--color-text-faint); font-size: 0.85rem; margin-left: auto; }
.claimed-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-tint);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

/* ---------------------------------------------------------------------
   判定卡片
   --------------------------------------------------------------------- */
.verdict-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  box-shadow: var(--shadow-card);
}
.verdict-block.needs-review {
  border-color: #f3c2ba;
  border-left: 4px solid var(--color-danger);
  background: linear-gradient(to right, var(--color-danger-bg), var(--color-surface) 14%);
}
.verdict-block audio { width: 100%; margin: var(--space-2) 0; }

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  margin-left: var(--space-2);
}
.badge-ok { background: var(--color-success-bg); color: var(--color-success); }
.badge-warn { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-danger { background: var(--color-danger-bg); color: var(--color-danger); }

.transcript { font-size: 0.9rem; color: #3a3f4a; margin: var(--space-2) 0 4px; }
.verdict-detail { font-size: 0.85rem; color: var(--color-text-muted); margin: 0; }

.code-badge {
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--color-primary-tint);
  color: var(--color-primary);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.03em;
  vertical-align: middle;
}

/* ---------------------------------------------------------------------
   零散小组件
   --------------------------------------------------------------------- */
.footer-link { margin-top: var(--space-6); font-size: 0.85rem; }

.greeting-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.logout-form { display: inline; margin: 0; }
.link-button {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-size: inherit;
  font-family: inherit;
  cursor: pointer;
}
.link-button:hover { color: var(--color-primary-hover); }