/* ===== 考试系统样式 ===== */

/* 考试中心 */
.exam-center { max-width: 1100px; margin: 0 auto; padding: 40px 32px 80px; }
.exam-hero { text-align: center; margin-bottom: 36px; }
.exam-hero h1 {
  font-family: var(--serif); font-size: 36px; font-weight: 700;
  color: var(--ink); letter-spacing: 3px; margin-bottom: 10px;
}
.exam-hero .sub { color: var(--ink-light); font-size: 14px; letter-spacing: 1px; }
.exam-hero .pass-rule {
  display: inline-block; margin-top: 16px; padding: 8px 20px;
  background: var(--cinnabar-pale); color: var(--cinnabar);
  border-radius: 20px; font-size: 13px; font-weight: 500;
}

.exam-overview {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin-bottom: 40px;
}
.ov-item {
  background: var(--paper-warm); border: 1px solid var(--line);
  border-radius: 12px; padding: 22px; text-align: center;
  transition: all .2s;
}
.ov-item:hover { transform: translateY(-2px); box-shadow: 0 8px 20px var(--shadow-deep); }
.ov-num {
  font-family: var(--serif); font-size: 32px; font-weight: 700;
  color: var(--cinnabar); line-height: 1;
}
.ov-label { font-size: 12px; color: var(--ink-light); margin-top: 8px; letter-spacing: 1px; }

.exam-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 18px;
}
.exam-card {
  background: var(--paper-warm); border: 1px solid var(--line);
  border-radius: 12px; padding: 22px 24px; position: relative;
  transition: all .25s; overflow: hidden;
}
.exam-card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px var(--shadow-deep); }
.exam-card.locked { opacity: 0.65; background: var(--paper-deep); }
.exam-card.passed { border-color: var(--jade); }
.exam-card.passed::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--jade);
}
.ec-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.ec-no { font-family: var(--serif); font-size: 13px; color: var(--cinnabar); font-weight: 700; letter-spacing: 2px; }
.ec-badge { font-size: 12px; padding: 3px 10px; border-radius: 12px; font-weight: 600; }
.ec-badge.passed { background: rgba(90, 122, 106, 0.15); color: var(--jade); }
.ec-badge.unlocked { background: var(--cinnabar-pale); color: var(--cinnabar); }
.ec-badge.locked { background: var(--paper-deep); color: var(--ink-light); }
.ec-title {
  font-family: var(--serif); font-size: 18px; font-weight: 700;
  color: var(--ink); margin-bottom: 12px; line-height: 1.4;
}
.ec-meta { display: flex; flex-wrap: wrap; gap: 10px; font-size: 12px; color: var(--ink-light); margin-bottom: 16px; }
.ec-meta .m-item { padding: 2px 8px; background: var(--paper); border-radius: 4px; }
.ec-meta .m-item.best { color: var(--cinnabar); font-weight: 600; }
.ec-actions { display: flex; gap: 10px; }
.ec-btn {
  flex: 1; padding: 9px 14px; border-radius: 8px; text-align: center;
  font-size: 13px; font-weight: 600; cursor: pointer; transition: all .15s;
  text-decoration: none; border: 1px solid transparent;
}
.ec-btn.primary { background: var(--cinnabar); color: #fff; }
.ec-btn.primary:hover { background: var(--cinnabar-soft); transform: translateY(-1px); }
.ec-btn.ghost { background: var(--paper); color: var(--ink-soft); border-color: var(--line); }
.ec-btn.ghost:hover { background: var(--paper-deep); }
.ec-btn.disabled { background: var(--paper-deep); color: var(--ink-light); cursor: not-allowed; }
.ec-progress { margin-top: 12px; height: 4px; background: var(--paper-deep); border-radius: 2px; overflow: hidden; }
.ec-progress .bar { height: 100%; background: var(--cinnabar); transition: width .6s; }

/* 未解锁页 */
.exam-locked-page { max-width: 600px; margin: 80px auto; text-align: center; padding: 0 24px; }
.lock-icon { font-size: 64px; margin-bottom: 20px; }
.exam-locked-page h1 { font-family: var(--serif); font-size: 28px; color: var(--ink); margin-bottom: 12px; }
.lock-title { font-family: var(--serif); font-size: 20px; color: var(--cinnabar); margin-bottom: 24px; }
.lock-desc { font-size: 16px; color: var(--ink-soft); margin-bottom: 8px; }
.lock-hint { font-size: 14px; color: var(--ink-light); line-height: 1.8; margin-bottom: 32px; }
.lock-actions { display: flex; gap: 12px; justify-content: center; }
.lock-btn {
  padding: 10px 22px; border-radius: 8px; font-size: 14px; font-weight: 600;
  text-decoration: none; transition: all .15s;
}
.lock-btn.primary { background: var(--cinnabar); color: #fff; }
.lock-btn.primary:hover { background: var(--cinnabar-soft); }
.lock-btn.ghost { background: var(--paper-warm); color: var(--ink-soft); border: 1px solid var(--line); }

/* 考试进行页 */
.exam-page { max-width: 1100px; margin: 0 auto; padding: 24px 32px 80px; }
.exam-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding-bottom: 20px; border-bottom: 1px solid var(--line); margin-bottom: 32px;
}
.eh-left .back-link { font-size: 13px; color: var(--ink-light); text-decoration: none; }
.eh-left .back-link:hover { color: var(--cinnabar); }
.eh-left h1 { font-family: var(--serif); font-size: 26px; color: var(--ink); margin: 8px 0 6px; }
.eh-meta { font-size: 13px; color: var(--ink-light); }
.eh-meta .dot { margin: 0 8px; }
.eh-meta strong { color: var(--cinnabar); }
.eh-right { display: flex; flex-direction: column; align-items: flex-end; }
.timer-label { font-size: 11px; color: var(--ink-light); letter-spacing: 1px; }
.timer-value { font-family: var(--mono); font-size: 24px; font-weight: 700; color: var(--cinnabar); }

/* 开始卡片 */
.exam-start-card {
  background: var(--paper-warm); border: 1px solid var(--line);
  border-radius: 16px; padding: 40px; text-align: center;
}
.sc-icon { font-size: 48px; margin-bottom: 16px; }
.exam-start-card h2 { font-family: var(--serif); font-size: 22px; color: var(--ink); margin-bottom: 24px; }
.sc-rules { max-width: 540px; margin: 0 auto 32px; text-align: left; }
.rule {
  display: flex; align-items: flex-start; gap: 14px; padding: 10px 0;
  font-size: 14px; color: var(--ink-soft); line-height: 1.7;
}
.r-num {
  flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%;
  background: var(--cinnabar); color: #fff; font-size: 12px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.start-btn {
  padding: 14px 48px; background: var(--cinnabar); color: #fff;
  border: none; border-radius: 10px; font-size: 16px; font-weight: 700;
  cursor: pointer; transition: all .2s; letter-spacing: 2px;
}
.start-btn:hover { background: var(--cinnabar-soft); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(192, 57, 43, 0.3); }
.start-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.history-section { margin-top: 40px; text-align: left; }
.history-section h3 { font-family: var(--serif); font-size: 16px; color: var(--ink); margin-bottom: 16px; }
.history-list { display: flex; flex-direction: column; gap: 8px; }
.history-item {
  display: flex; gap: 16px; align-items: center; padding: 10px 16px;
  background: var(--paper); border-radius: 8px; font-size: 13px;
}
.history-item.pass { border-left: 3px solid var(--jade); }
.history-item.fail { border-left: 3px solid var(--cinnabar); }
.hi-score { font-family: var(--serif); font-weight: 700; font-size: 16px; }
.history-item.pass .hi-score { color: var(--jade); }
.history-item.fail .hi-score { color: var(--cinnabar); }
.hi-detail { color: var(--ink-soft); }
.hi-time { color: var(--ink-light); margin-left: auto; }
.hi-status { font-weight: 600; }
.history-item.pass .hi-status { color: var(--jade); }
.history-item.fail .hi-status { color: var(--cinnabar); }

/* 题号导航 */
.q-nav {
  display: flex; flex-wrap: wrap; gap: 8px; padding: 16px;
  background: var(--paper-warm); border: 1px solid var(--line);
  border-radius: 12px; margin-bottom: 20px;
}
.qn-item {
  width: 36px; height: 36px; border-radius: 8px;
  background: var(--paper); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600; color: var(--ink-soft);
  cursor: pointer; transition: all .15s;
}
.qn-item:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.qn-item.active { background: var(--cinnabar); color: #fff; border-color: var(--cinnabar); }
.qn-item.answered { background: var(--jade); color: #fff; border-color: var(--jade); }
.qn-item.code { font-family: var(--mono); }
.qn-item.code.active { background: var(--ink); border-color: var(--ink); }

/* 题目区 */
.q-container { min-height: 400px; }
.question {
  background: var(--paper-warm); border: 1px solid var(--line);
  border-radius: 12px; padding: 28px 32px;
}
.q-head { display: flex; gap: 12px; align-items: center; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--line-soft); }
.q-type { font-size: 12px; padding: 3px 10px; border-radius: 12px; font-weight: 600; }
.q-type.single { background: var(--cinnabar-pale); color: var(--cinnabar); }
.q-type.multi { background: rgba(176, 141, 60, 0.15); color: var(--gold); }
.q-type.code { background: var(--ink); color: #fff; }
.q-idx { font-size: 13px; color: var(--ink-light); }
.q-diff { font-size: 11px; padding: 2px 8px; border-radius: 10px; margin-left: auto; }
.diff-1 { background: #e8f5e9; color: #2e7d32; }
.diff-2 { background: #e3f2fd; color: #1565c0; }
.diff-3 { background: #fff3e0; color: #e65100; }
.diff-4 { background: #ffebee; color: #c62828; }
.q-content { font-size: 16px; line-height: 1.8; color: var(--ink); margin-bottom: 20px; }
.q-kp { font-size: 12px; color: var(--ink-light); margin-top: 16px; padding-top: 12px; border-top: 1px dashed var(--line); }

.q-options { display: flex; flex-direction: column; gap: 10px; }
.opt-item {
  display: flex; gap: 14px; align-items: flex-start; padding: 14px 18px;
  background: var(--paper); border: 1px solid var(--line);
  border-radius: 10px; cursor: pointer; transition: all .15s;
}
.opt-item:hover { border-color: var(--cinnabar); background: #fff; }
.opt-item.selected { border-color: var(--cinnabar); background: var(--cinnabar-pale); }
.opt-letter {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  background: var(--paper-deep); color: var(--ink-soft);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; font-family: var(--serif);
}
.opt-item.selected .opt-letter { background: var(--cinnabar); color: #fff; }
.opt-text { font-size: 14px; line-height: 1.7; color: var(--ink); flex: 1; }

/* 编程题 */
.cq-title { font-family: var(--serif); font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 12px; }
.cq-desc { font-size: 14px; line-height: 1.8; color: var(--ink-soft); margin-bottom: 16px; padding: 14px 18px; background: var(--paper); border-radius: 8px; border-left: 3px solid var(--gold); }
.cq-sig { font-size: 13px; color: var(--ink-light); margin-bottom: 16px; }
.cq-sig code { background: var(--ink); color: #fff; padding: 2px 8px; border-radius: 4px; font-family: var(--mono); font-size: 12px; }
.cq-editor-wrap { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.ce-toolbar { display: flex; justify-content: space-between; align-items: center; padding: 8px 16px; background: var(--ink); color: #aaa; }
.ce-label { font-size: 12px; letter-spacing: 1px; }
.judge-btn {
  padding: 6px 16px; background: var(--cinnabar); color: #fff;
  border: none; border-radius: 6px; font-size: 12px; font-weight: 600;
  cursor: pointer; transition: all .15s;
}
.judge-btn:hover { background: var(--cinnabar-soft); }
.judge-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.code-editor {
  width: 100%; min-height: 320px; padding: 16px;
  background: #0d0d1a; color: #d4d4e8;
  font-family: var(--mono); font-size: 13px; line-height: 1.6;
  border: none; outline: none; resize: vertical; tab-size: 4;
}
.cq-result { margin-top: 16px; }
.code-result { border-radius: 10px; padding: 16px 20px; }
.code-result.pass { background: rgba(90, 122, 106, 0.1); border: 1px solid var(--jade); }
.code-result.fail { background: rgba(192, 57, 43, 0.08); border: 1px solid var(--cinnabar); }
.cr-head { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.cr-status { font-weight: 700; font-size: 15px; }
.code-result.pass .cr-status { color: var(--jade); }
.code-result.fail .cr-status { color: var(--cinnabar); }
.cr-score { font-family: var(--serif); font-size: 18px; font-weight: 700; color: var(--ink); }
.cr-cases { font-size: 13px; color: var(--ink-soft); }
.cr-perf { font-size: 12px; color: var(--ink-light); font-family: var(--mono); }
.cr-details { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.cr-case-detail {
  padding: 10px 14px; background: var(--paper); border-radius: 8px;
  border-left: 3px solid var(--line);
}
.cr-case-detail.pass { border-left-color: var(--jade); }
.cr-case-detail.fail { border-left-color: var(--cinnabar); }
.cr-case-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; font-family: var(--mono); margin-bottom: 8px;
}
.cr-case-head span:first-child { font-weight: 700; color: var(--ink); }
.cr-case-detail.pass .cr-case-head span:nth-child(2) { color: var(--jade); }
.cr-case-detail.fail .cr-case-head span:nth-child(2) { color: var(--cinnabar); }
.cr-case-head span:last-child { color: var(--ink-light); }
.cr-io { margin-top: 6px; }
.cr-io-label {
  display: inline-block; font-size: 11px; font-weight: 600;
  color: var(--ink-light); margin-bottom: 2px;
  padding: 1px 6px; background: var(--paper-deep); border-radius: 3px;
}
.cr-io-pre {
  margin: 0; padding: 8px 10px; background: #0d0d1a; color: #d4d4e8;
  border-radius: 4px; font-family: var(--mono); font-size: 12px;
  white-space: pre-wrap; word-break: break-word; max-height: 200px; overflow-y: auto;
}
.cr-io-pre.mismatch { background: #1a0d0d; color: #ff9999; }
.cr-io-pre.stderr { background: #1a1a0d; color: #ffcc66; }
.cr-errors { margin-top: 12px; padding: 12px; background: #0d0d1a; color: #ff6b6b; border-radius: 6px; overflow-x: auto; }
.cr-errors pre { font-family: var(--mono); font-size: 12px; white-space: pre-wrap; word-break: break-word; }

/* 底部操作 */
.exam-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 24px; padding: 16px 20px;
  background: var(--paper-warm); border: 1px solid var(--line); border-radius: 12px;
}
.ef-btn {
  padding: 10px 24px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--paper); color: var(--ink-soft);
  font-size: 14px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.ef-btn:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.ef-btn.submit { background: var(--cinnabar); color: #fff; border-color: var(--cinnabar); }
.ef-btn.submit:hover { background: var(--cinnabar-soft); }
.ef-progress { font-size: 14px; color: var(--ink-light); font-family: var(--serif); }
.ef-progress span:first-child { color: var(--cinnabar); font-weight: 700; }

/* 结果页 */
.exam-result { max-width: 800px; margin: 0 auto; }
.er-card {
  background: var(--paper-warm); border: 1px solid var(--line);
  border-radius: 16px; padding: 40px; text-align: center; margin-bottom: 32px;
}
.er-icon { font-size: 64px; margin-bottom: 16px; }
.er-score { font-family: var(--serif); font-size: 56px; font-weight: 700; line-height: 1; margin-bottom: 8px; }
.er-score.pass { color: var(--jade); }
.er-score.fail { color: var(--cinnabar); }
.er-status { font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.er-status.pass { color: var(--jade); }
.er-status.fail { color: var(--cinnabar); }
.er-detail { font-size: 14px; color: var(--ink-soft); margin-bottom: 20px; }
.er-next { font-size: 14px; color: var(--ink); padding: 12px 20px; background: var(--paper); border-radius: 8px; margin-bottom: 24px; }
.er-next a { color: var(--cinnabar); font-weight: 600; }
.er-actions { display: flex; gap: 12px; justify-content: center; }
.er-btn {
  padding: 10px 22px; border-radius: 8px; font-size: 14px; font-weight: 600;
  text-decoration: none; cursor: pointer; transition: all .15s; border: 1px solid transparent;
}
.er-btn.primary { background: var(--cinnabar); color: #fff; }
.er-btn.primary:hover { background: var(--cinnabar-soft); }
.er-btn.ghost { background: var(--paper); color: var(--ink-soft); border-color: var(--line); }
.er-btn.ghost:hover { background: var(--paper-deep); }

/* 题目回顾 */
.review-section { background: var(--paper-warm); border: 1px solid var(--line); border-radius: 12px; padding: 24px 28px; }
.review-section h3 { font-family: var(--serif); font-size: 18px; color: var(--ink); margin-bottom: 20px; }
.review-item { padding: 16px 20px; margin-bottom: 12px; border-radius: 8px; border-left: 3px solid; }
.review-item.pass { background: rgba(90, 122, 106, 0.08); border-color: var(--jade); }
.review-item.fail { background: rgba(192, 57, 43, 0.06); border-color: var(--cinnabar); }
.ri-head { display: flex; gap: 16px; align-items: center; margin-bottom: 8px; }
.ri-idx { font-size: 13px; color: var(--ink-light); font-weight: 600; }
.ri-status { font-size: 13px; font-weight: 600; }
.review-item.pass .ri-status { color: var(--jade); }
.review-item.fail .ri-status { color: var(--cinnabar); }
.ri-score { font-family: var(--serif); font-weight: 700; color: var(--ink); margin-left: auto; }
.ri-title { font-size: 14px; color: var(--ink-soft); }
.ri-perf { font-size: 12px; color: var(--ink-light); font-family: var(--mono); margin: 4px 0 8px; }
.ri-content { font-size: 14px; color: var(--ink); line-height: 1.7; margin-bottom: 10px; }
.ri-ans { display: flex; gap: 24px; font-size: 13px; color: var(--ink-soft); margin-bottom: 8px; }
.ra-user strong { color: var(--cinnabar); }
.ra-correct strong { color: var(--jade); }
.ri-expl { font-size: 13px; color: var(--ink-light); padding: 10px 14px; background: var(--paper); border-radius: 6px; line-height: 1.7; }

/* 响应式 */
@media (max-width: 768px) {
  .exam-center, .exam-page { padding: 20px 16px 60px; }
  .exam-overview { grid-template-columns: repeat(2, 1fr); }
  .exam-list { grid-template-columns: 1fr; }
  .exam-header { flex-direction: column; gap: 16px; }
  .eh-left h1 { font-size: 20px; }
  .question { padding: 18px 16px; }
  .q-content { font-size: 15px; }
  .code-editor { min-height: 240px; font-size: 12px; }
  .er-card { padding: 28px 20px; }
  .er-score { font-size: 42px; }
  .er-actions { flex-wrap: wrap; }
  .cr-head { gap: 10px; }
}

/* ===== 题目反馈按钮 ===== */
.q-feedback-btn {
  margin-left: auto;
  padding: 3px 10px;
  border: 1px solid var(--border,#ddd);
  border-radius: 4px;
  background: transparent;
  color: var(--ink-light,#888);
  font-size: 12px;
  cursor: pointer;
}
.q-feedback-btn:hover {
  background: var(--bg-hover,#f5f5f5);
  color: var(--accent,#2563eb);
  border-color: var(--accent,#2563eb);
}

/* 编程题回顾：思路解析 */
.ri-hint {
  background: #fefce8;
  border-left: 3px solid #ca8a04;
  padding: 10px 14px;
  margin-top: 10px;
  border-radius: 0 6px 6px 0;
  font-size: 13px;
  line-height: 1.7;
  color: #713f12;
  white-space: pre-wrap;
}
.ri-hint-title {
  font-weight: 600;
  margin-bottom: 4px;
  color: #a16207;
}
.ri-code-details {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.ri-case {
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 3px;
}
.ri-case.pass { background: #d1fae5; color: #065f46; }
.ri-case.fail { background: #fee2e2; color: #b91c1c; }

/* ===== 登录/注册页面 ===== */
.auth-page {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background: var(--bg,#f8f6f0);
}
.auth-card {
  background: var(--card,#fff);
  border: 1px solid var(--border,#eee);
  border-radius: 16px;
  padding: 36px 40px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.auth-header { text-align: center; margin-bottom: 24px; }
.auth-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--cinnabar,#c0392b);
  color: #fff;
  font-size: 24px;
  font-weight: 700;
  border-radius: 12px;
  margin-bottom: 12px;
}
.auth-header h1 {
  font-size: 22px;
  color: var(--ink,#222);
  margin: 0 0 4px;
  font-weight: 600;
}
.auth-sub {
  font-size: 13px;
  color: var(--ink-light,#888);
  margin: 0;
}
.auth-tabs {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border,#eee);
}
.auth-tab {
  flex: 1;
  text-align: center;
  padding: 10px;
  color: var(--ink-light,#888);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.auth-tab.active {
  color: var(--accent,#2563eb);
  border-bottom-color: var(--accent,#2563eb);
  font-weight: 600;
}
.auth-form .form-field { margin-bottom: 14px; }
.auth-form label {
  display: block;
  font-size: 13px;
  color: var(--ink-light,#666);
  margin-bottom: 5px;
}
.auth-form input {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border,#ddd);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  box-sizing: border-box;
}
.auth-form input:focus {
  outline: none;
  border-color: var(--accent,#2563eb);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.auth-error {
  color: #dc2626;
  font-size: 13px;
  min-height: 18px;
  margin-bottom: 8px;
}
.auth-submit {
  width: 100%;
  padding: 11px;
  background: var(--accent,#2563eb);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}
.auth-submit:hover:not(:disabled) {
  background: #1d4ed8;
}
.auth-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.auth-hint {
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  color: var(--ink-light,#888);
}
.auth-hint a {
  color: var(--accent,#2563eb);
  text-decoration: none;
}
.auth-demo {
  margin-top: 24px;
  padding: 14px;
  background: var(--bg,#f8f6f0);
  border-radius: 8px;
}
.demo-title {
  font-size: 12px;
  color: var(--ink-light,#888);
  margin-bottom: 8px;
}
.demo-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  margin: 4px 0;
  background: var(--card,#fff);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.demo-row:hover { background: var(--bg-hover,#f0f0f0); }
.demo-tag {
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 11px;
}
.demo-tag.admin { background: #fee2e2; color: #b91c1c; }
.demo-tag.student { background: #dbeafe; color: #1e40af; }
.demo-fill {
  margin-left: auto;
  font-size: 11px;
  color: var(--ink-light,#999);
}