/* ============================================================
 * 业务组件：五态选项行 / 答题卡九宫格 / 练习页 / 结果页 / 搜题结果卡
 * ============================================================ */

/* ============ 练习首页（home） ============ */
.hero {
  margin: 12px var(--pad-page);
  padding: 18px;
  border-radius: var(--radius-card);
  background: linear-gradient(135deg, #2563EB, #3B82F6);
  color: #fff;
  box-shadow: var(--shadow-card);
}
.hero-title { font-size: 18px; font-weight: 700; }
.hero-sub { margin-top: 4px; font-size: 12px; opacity: 0.85; }
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 14px;
}
.stat-cell { text-align: center; }
.stat-num { font-size: 20px; font-weight: 700; }
.stat-label { margin-top: 2px; font-size: 11px; opacity: 0.85; }

.ring-wrap {
  display: flex;
  align-items: center;
  gap: 18px;
}
.ring {
  width: 84px;
  height: 84px;
  flex-shrink: 0;
}
.ring text { fill: var(--text-main); }
.ring-num { font-size: 18px; font-weight: 700; }
.ring-cap { font-size: 10px; fill: var(--text-sub); }
.ring-side { flex: 1; min-width: 0; }
.ring-side .row-sub { white-space: normal; }

.resume-card {
  display: flex;
  align-items: center;
  gap: 12px;
  width: calc(100% - 2 * var(--pad-page));
  margin: 10px var(--pad-page);
  padding: 14px;
  border: 0;
  border-radius: var(--radius-card);
  background: var(--surface-card);
  box-shadow: var(--shadow-card);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: var(--text-main);
}
.resume-card:active { background: #F7F8FC; }

/* ============ 答题页（practice） ============ */
.practice-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px var(--pad-page) 0;
}
.practice-progress { flex: 1; }
.practice-timer {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-sub);
  font-variant-numeric: tabular-nums;
}
.practice-mode-line {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px var(--pad-page) 0;
}
.practice-multi-hint { font-size: 12px; color: var(--text-sub); }
.practice-stem {
  margin: 10px var(--pad-page);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  word-break: break-word;
}
.practice-opts { margin: 0 var(--pad-page); }

/* 五态选项行（对齐 QuestionActivity.buildOptionRow） */
.opt-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px;
  margin-bottom: 10px;
  border-radius: var(--radius-row);
  background: var(--opt-normal-bg);
  border: 1px solid var(--opt-normal-line);
  cursor: pointer;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-main);
  width: 100%;
  text-align: left;
  font-family: inherit;
  word-break: break-word;
}
.opt-row:active { filter: brightness(0.97); }
.opt-row.st-picked {
  border: 2px solid var(--opt-picked-line);
  padding: 12px;
}
.opt-row.st-ok {
  border-color: var(--opt-ok-line);
  background: var(--opt-ok-bg);
  color: var(--opt-ok-text);
}
.opt-row.st-wrong {
  border-color: var(--opt-bad-line);
  background: var(--opt-bad-bg);
  color: var(--opt-bad-text);
}
.opt-row.st-missed {
  border: 2px dashed var(--opt-missed-line);
  background: var(--opt-missed-bg);
  color: var(--opt-ok-text);
  padding: 12px;
}
.opt-badge {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-badge);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  background: var(--divider);
  color: var(--text-main);
}
.opt-row.st-picked .opt-badge { background: var(--brand); color: #fff; }
.opt-row.st-ok .opt-badge { background: var(--correct); color: #fff; }
.opt-row.st-wrong .opt-badge { background: var(--wrong); color: #fff; }
.opt-row.st-missed .opt-badge {
  background: var(--opt-ok-bg);
  color: var(--correct);
  border: 1px solid var(--opt-ok-line);
}
.opt-text { flex: 1; min-width: 0; }

/* 反馈卡 */
.feedback {
  margin: 4px var(--pad-page) 0;
  padding: 13px;
  border-radius: var(--radius-card);
  background: var(--surface-card);
  box-shadow: var(--shadow-card);
}
.feedback-result { font-size: 15px; font-weight: 700; }
.feedback-result.ok { color: var(--correct); }
.feedback-result.bad { color: var(--wrong); }
.feedback-line { margin-top: 6px; font-size: 14px; word-break: break-word; }
.feedback-line.ok { color: var(--correct); }
.feedback-line.bad { color: var(--wrong); }
.feedback-explain {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--divider);
  font-size: 13px;
  color: #4B5563;
  word-break: break-word;
  white-space: pre-wrap;
}

/* 底部操作条：sticky 在滚动容器内 */
.action-bar {
  position: sticky;
  bottom: 0;
  z-index: 10;
  display: flex;
  gap: 10px;
  padding: 10px var(--pad-page) calc(10px + env(safe-area-inset-bottom));
  background: linear-gradient(to top, var(--surface-page) 70%, rgba(244, 246, 251, 0));
}
.action-bar .btn { flex: 1; }
.action-bar .btn-ghost {
  flex: 0 0 auto;
  width: 48px;
  padding: 13px 0;
  background: var(--surface-card);
  color: var(--text-main);
  border: 1px solid var(--divider);
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}

/* ============ 答题卡抽屉 ============ */
.ac-stats {
  display: flex;
  gap: 14px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 10px;
}
.ac-stats b { font-weight: 700; }
.ac-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px 3px;
}
.ac-cell {
  height: 44px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  background: var(--card-blank-bg);
  color: var(--text-sub);
  border: 0;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
}
.ac-cell.ok { background: var(--card-correct-bg); color: var(--card-correct); font-weight: 600; }
.ac-cell.wrong { background: var(--card-wrong-bg); color: var(--card-wrong); font-weight: 600; }
.ac-cell.answered { background: var(--brand-bg); color: var(--brand); }
.ac-cell.current { outline: 2px solid var(--brand); outline-offset: -2px; font-weight: 700; }
.ac-submit { margin-top: 14px; }

/* ============ 结果页 ============ */
.result-hero { text-align: center; padding: 22px 16px 16px; }
.result-rate { font-size: 40px; font-weight: 800; color: var(--brand); }
.result-note { margin-top: 4px; font-size: 13px; color: var(--correct); }
.result-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 0 var(--pad-page);
}
.result-cell {
  background: var(--surface-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 12px 4px;
  text-align: center;
}
.result-cell b { display: block; font-size: 18px; }
.result-cell span { font-size: 11px; color: var(--text-sub); }
.result-wrong-item {
  padding: 12px 14px;
  border-bottom: 1px solid var(--divider);
  cursor: pointer;
}
.result-wrong-item:last-child { border-bottom: 0; }
.result-wrong-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-sub);
}
.result-wrong-stem {
  margin-top: 4px;
  font-size: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.result-wrong-ans { margin-top: 4px; font-size: 12px; color: var(--text-sub); }
.history-row {
  padding: 12px 14px;
  border-bottom: 1px solid var(--divider);
  font-size: 13px;
}
.history-row:last-child { border-bottom: 0; }
.history-line { color: var(--text-main); }

/* ============ 题库管理 ============ */
.bank-item-actions { display: flex; gap: 6px; flex-shrink: 0; }
.icon-btn {
  border: 0;
  background: #EEF0F4;
  border-radius: 8px;
  padding: 6px 9px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text-sub);
}
.icon-btn:active { background: var(--divider); }
.import-tip { font-size: 12px; color: var(--text-sub); margin-top: 8px; word-break: break-all; }
.scope-check {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 2px;
  border-bottom: 1px solid var(--divider);
  font-size: 15px;
}
.scope-check:last-child { border-bottom: 0; }
.scope-check input { width: 18px; height: 18px; flex-shrink: 0; }

/* ============ 错题本 ============ */
.wrong-group-title {
  margin: 16px var(--pad-page) 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-sub);
}

/* ============ 搜题页 ============ */
.search-stage {
  margin: 12px var(--pad-page);
  border-radius: var(--radius-card);
  background: var(--surface-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.search-viewfinder {
  position: relative;
  background: #111827;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.search-viewfinder img { max-width: 100%; max-height: 320px; display: block; }
.search-frame {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 82%;
  height: 150px;
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: 10px;
  box-shadow: 0 0 0 2000px rgba(17, 24, 39, 0.45);
  pointer-events: none;
}
.search-frame-line {
  position: absolute;
  left: 8%;
  right: 8%;
  top: 50%;
  height: 2px;
  background: var(--brand);
  opacity: 0.9;
}
.search-video { width: 100%; display: block; }
.search-ocr-text {
  width: calc(100% - 2 * var(--pad-page));
  margin: 10px auto 0;
  display: block;
  min-height: 84px;
  font-size: 15px;
}
.search-status {
  margin: 10px var(--pad-page) 0;
  font-size: 13px;
  color: var(--text-sub);
  text-align: center;
}

/* 搜题结果卡（对齐 SearchResultActivity.renderBest） */
.result-card {
  margin: 12px var(--pad-page);
  padding: 14px;
  border-radius: var(--radius-card);
  background: var(--surface-card);
  box-shadow: var(--shadow-card);
}
.result-card-tags { display: flex; gap: 8px; align-items: center; }
.result-card-bank { font-size: 12px; color: var(--text-sub); }
.result-card-caption {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-sub);
}
.result-card-answer {
  margin-top: 2px;
  font-size: 22px;
  font-weight: 700;
  color: var(--correct);
  white-space: pre-wrap;
  word-break: break-word;
}
.result-card-answer.low { color: var(--wrong); }
.result-card-stem {
  margin-top: 12px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  word-break: break-word;
}
.result-card-opts { margin-top: 10px; }
.rc-opt {
  padding: 9px 11px;
  border-radius: 9px;
  background: #F3F4F6;
  color: var(--text-main);
  font-size: 14px;
  margin-bottom: 6px;
  word-break: break-word;
}
.rc-opt.correct {
  background: var(--opt-ok-bg);
  border: 1.5px solid var(--opt-ok-line);
  color: var(--opt-ok-text);
  font-weight: 700;
}
.result-card-explain {
  margin-top: 10px;
  font-size: 13px;
  color: #4B5563;
  white-space: pre-wrap;
  word-break: break-word;
}
.result-card-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}
.result-card-actions .btn { flex: 1; padding: 11px 8px; font-size: 14px; }
.model-progress {
  margin: 10px var(--pad-page) 0;
  font-size: 13px;
  color: var(--text-sub);
}

/* ============ 我的 / 激活 ============ */
.mine-device-code {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 2px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  padding: 8px 0 2px;
}
.mine-hint { font-size: 12px; color: var(--text-sub); text-align: center; }
.activate-input {
  text-align: center;
  letter-spacing: 4px;
  text-transform: uppercase;
}
.license-ok {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--correct);
  font-weight: 600;
}
.license-bad {
  margin-top: 8px;
  color: var(--wrong);
  font-size: 13px;
  min-height: 18px;
  text-align: center;
  word-break: break-all;
}
.mine-storage { font-size: 12px; color: var(--text-sub); margin-top: 4px; }
.about-line {
  display: flex;
  justify-content: space-between;
  padding: 11px 2px;
  border-bottom: 1px solid var(--divider);
  font-size: 14px;
}
.about-line:last-child { border-bottom: 0; }
.about-line span:last-child { color: var(--text-sub); }
.update-banner {
  margin: 0 var(--pad-page);
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--brand-bg);
  color: var(--brand);
  font-size: 14px;
  text-align: center;
  cursor: pointer;
}