/* ============================================================================
 * 冲击波数学 · 强化训练面板样式（Training Dojo）
 * ----------------------------------------------------------------------------
 * 沿用 Y5-6 数学课次页的视觉语言：深蓝表头、圆角卡片、品牌绿强调、
 * 英文小一号（.i18n-en 由 styles.css 统一处理）。
 * 2026-11-02
 * ============================================================================ */

.training-shell {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ---------- 三类题库切换 ---------- */
.training-modes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.training-mode {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  padding: 14px 16px;
  border: 1px solid var(--ie-line, #d8dee9);
  border-radius: 14px;
  background: #ffffff;
  color: var(--ie-ink, #16233a);
  cursor: pointer;
  text-align: left;
  font: inherit;
  transition: border-color .16s ease, box-shadow .16s ease, background .16s ease;
}

.training-mode strong {
  font-size: 1.02rem;
  line-height: 1.35;
}

.training-mode span.i18n-en {
  font-size: .78rem;
  opacity: .68;
}

.training-mode:hover {
  border-color: var(--ie-accent, #2f6f5e);
}

.training-mode.active {
  border-color: var(--ie-accent, #2f6f5e);
  background: linear-gradient(180deg, #f2f8f5 0%, #ffffff 100%);
  box-shadow: 0 6px 18px rgba(20, 60, 50, .10);
}

.training-mode.active strong {
  color: var(--ie-accent, #2f6f5e);
}

/* ---------- 轮次控制条 ---------- */
.training-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--ie-line, #d8dee9);
  border-radius: 14px;
  background: #f7f9fc;
}

.training-desc {
  margin: 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.65;
  color: #3a4a63;
}

.training-desc span.i18n-en {
  display: block;
  margin-top: 2px;
  font-size: .8rem;
  opacity: .7;
}

.training-round {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.training-round label {
  font-size: .92rem;
  color: #46566f;
  white-space: nowrap;
}

.training-round input {
  width: 72px;
  padding: 8px 10px;
  border: 1px solid var(--ie-line, #d8dee9);
  border-radius: 9px;
  font: inherit;
  text-align: center;
  background: #fff;
}

/* ---------- 统计条 ---------- */
.training-stat {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.training-stat span {
  padding: 6px 12px;
  border-radius: 999px;
  background: #eef3f8;
  color: #43536c;
  font-size: .86rem;
}

.training-stat b {
  color: var(--ie-accent, #2f6f5e);
  font-size: 1rem;
}

/* ---------- 题目列表 ---------- */
.training-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.training-item {
  border: 1px solid var(--ie-line, #d8dee9);
  border-radius: 14px;
  padding: 16px 18px;
  background: #fff;
}

.training-q-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.training-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--ie-accent, #2f6f5e);
  color: #fff;
  font-size: .82rem;
  font-weight: 700;
}

.training-skill,
.training-bucket {
  padding: 3px 9px;
  border-radius: 999px;
  font-size: .74rem;
  letter-spacing: .02em;
}

.training-skill {
  background: #eaf2ff;
  color: #23518f;
}

.training-bucket {
  background: #f2f4f8;
  color: #5a6a80;
}

.training-prompt {
  margin: 0 0 4px;
  font-size: 1.02rem;
  line-height: 1.7;
  color: #16233a;
}

.training-prompt-zh {
  margin: 0 0 12px;
  font-size: .86rem;
  line-height: 1.7;
  color: #5a6a80;
}

.training-input {
  width: 100%;
  min-height: 76px;
}

.training-input.is-right {
  border-color: #2f8f5b;
  background: #f2fbf5;
}

.training-input.is-wrong {
  border-color: #c86a4a;
  background: #fdf5f2;
}

/* ---------- 答案与步骤 ---------- */
.training-answer {
  margin-top: 12px;
  padding: 13px 15px;
  border-left: 3px solid var(--ie-accent, #2f6f5e);
  border-radius: 0 10px 10px 0;
  background: #f4f8f6;
}

.training-answer-line {
  margin: 0 0 4px;
  font-size: .98rem;
  color: #16342b;
}

.training-answer-zh {
  margin: 0 0 8px;
  font-size: .85rem;
  color: #5a6a80;
}

.training-steps {
  margin: 6px 0 0;
  padding-left: 20px;
}

.training-steps li {
  margin-bottom: 7px;
  font-size: .9rem;
  line-height: 1.65;
  color: #33425a;
}

.training-step-en {
  display: block;
}

.training-step-zh {
  display: block;
  margin-top: 2px;
  font-size: .82rem;
  color: #5a6a80;
}

/* ---------- 结果 ---------- */
.training-result {
  padding: 15px 18px;
  border-radius: 14px;
  background: #10243d;
  color: #fff;
}

.training-result h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
}

.training-result p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.7;
}

.training-result b {
  color: #8fe0c0;
  font-size: 1.25rem;
}

.training-result-en {
  margin-top: 4px !important;
  font-size: .82rem !important;
  opacity: .72;
}

.training-empty {
  padding: 28px;
  text-align: center;
  color: #5a6a80;
  border: 1px dashed var(--ie-line, #d8dee9);
  border-radius: 14px;
}

/* ---------- 移动端 ---------- */
@media (max-width: 760px) {
  .training-modes {
    grid-template-columns: 1fr;
  }

  .training-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .training-round {
    justify-content: flex-start;
  }

  .training-item {
    padding: 14px;
  }
}