/* ============================================================
   SwimX — 教案资源库专属样式
   ============================================================ */

/* 筛选栏 */
.filter-bar {
  background: var(--card); border-radius: var(--r); box-shadow: var(--sh);
  border: 1.5px solid var(--border); padding: 16px 20px; margin-bottom: 20px;
}
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; }
.filter-row:last-child { margin-bottom: 0; }
.filter-label { font-size: 12px; font-weight: 700; color: var(--ts); margin-right: 4px; white-space: nowrap; }
.filter-tab {
  padding: 6px 14px; border-radius: 20px; border: 1.5px solid var(--border);
  background: #fff; font-size: 12px; font-weight: 600; color: var(--ts); cursor: pointer;
  transition: all .2s; white-space: nowrap;
}
.filter-tab:hover { border-color: var(--b); color: var(--b); }
.filter-tab.active { background: var(--b); color: #fff; border-color: var(--b); }
.filter-tab.featured-tab { border-color: var(--a); color: var(--ad); }
.filter-tab.featured-tab:hover { background: var(--al); border-color: var(--ad); }
.filter-tab.featured-tab.active { background: var(--a); color: #fff; border-color: var(--a); }

.search-input {
  padding: 8px 14px; border: 1.5px solid var(--border); border-radius: 20px;
  font-size: 13px; outline: none; transition: border .2s; width: 200px; font-family: inherit;
}
.search-input:focus { border-color: var(--b); }

/* 页面标题 */
.page-header { margin: 28px 0 20px; display: flex; align-items: center; gap: 16px; }
.page-header .icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg,#4EA8DE,#3B82F6);
  display: flex; align-items: center; justify-content: center; font-size: 28px; color: #fff;
  box-shadow: 0 6px 20px rgba(78,168,222,.3);
}
.page-header h1 { font-size: 24px; font-weight: 800; }
.page-header .sub { font-size: 13px; color: var(--ts); margin-top: 2px; }

/* 搜索栏 */
.search-bar { margin-bottom: 16px; }
.search-bar .search-input {
  width: 100%; padding: 12px 18px; border: 1.5px solid var(--border);
  border-radius: 12px; font-size: 14px; outline: none; transition: border .2s;
  font-family: inherit; background: #fff; box-shadow: var(--sh);
}
.search-bar .search-input:focus { border-color: var(--b); box-shadow: var(--shm); }

/* 信息栏 */
.info-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.info-count { font-size: 13px; color: var(--ts); }
.info-summary { font-size: 12px; color: var(--tl); }

/* 返回栏 */
.back-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.back-bar .back-title { font-size: 16px; font-weight: 800; }

/* 单元卡片 */
.unit-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 14px; }
.unit-card {
  background: var(--card); border-radius: var(--r); box-shadow: var(--sh);
  border: 1.5px solid var(--border); padding: 24px; transition: all .25s;
  cursor: pointer; display: flex; align-items: center; gap: 16px;
}
.unit-card:hover { transform: translateY(-3px); box-shadow: var(--shl); border-color: var(--p); }
.unit-card.featured { border-color: var(--a); background: linear-gradient(135deg,#FFFDF5,#FFF8E7); }
.unit-card.featured:hover { border-color: var(--ad); }

.uc-icon {
  width: 52px; height: 52px; border-radius: 14px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 26px;
}
.uc-icon.c1 { background: #F3E8FF; color: #8B5CF6; }
.uc-icon.c2 { background: #FFF0D1; color: #E5A020; }
.uc-icon.c3 { background: #E0F5F0; color: #0D9488; }
.uc-icon.c4 { background: #FFE0E0; color: #FF6B6B; }
.uc-icon.c5 { background: #F3E8FF; color: #8B5CF6; }
.uc-icon.c6 { background: #FFF0D1; color: #E5A020; }
.uc-icon.c7 { background: #E0F5F0; color: #0D9488; }
.uc-icon.c8 { background: #FFE0E0; color: #FF6B6B; }
.uc-icon.c9 { background: #D8F3DC; color: #40916C; }
.uc-icon.cstar { background: #FFF8E7; color: #E5A020; }
.uc-info { flex: 1; min-width: 0; }
.uc-name { font-size: 16px; font-weight: 800; margin-bottom: 2px; }
.uc-desc { font-size: 12px; color: var(--ts); margin-bottom: 4px; }
.uc-meta { font-size: 11px; color: var(--tl); }
.uc-arrow { font-size: 18px; color: var(--tl); }

/* 教案卡片 */
.plan-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 14px; }
.plan-card {
  background: var(--card); border-radius: var(--r); box-shadow: var(--sh);
  border: 1.5px solid var(--border); padding: 20px; transition: all .25s;
  display: flex; flex-direction: column; gap: 12px; position: relative;
}
.plan-card:hover { transform: translateY(-3px); box-shadow: var(--shl); border-color: var(--b); }
.plan-card.featured { border-color: var(--a); background: linear-gradient(135deg,#FFFDF5,#FFF8E7); }
.plan-card.featured:hover { border-color: var(--ad); box-shadow: 0 8px 30px rgba(255,182,39,.2); }
.plan-card .featured-badge {
  position: absolute; top: -1px; right: 16px; background: var(--a); color: #fff;
  padding: 3px 12px 5px; border-radius: 0 0 8px 8px; font-size: 11px; font-weight: 800;
}
.plan-card .plan-top { display: flex; gap: 12px; align-items: flex-start; }
.plan-card .plan-icon {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.plan-card .plan-icon.track { background: #FFF0D1; color: #E5A020; }
.plan-card .plan-icon.ball { background: #FFE0E0; color: #FF6B6B; }
.plan-card .plan-icon.gym { background: #F3E8FF; color: #8B5CF6; }
.plan-card .plan-icon.traditional { background: #FFE8E0; color: #C2410C; }
.plan-card .plan-icon.new { background: #E0F5F0; color: #0D9488; }
.plan-card .plan-icon.indoor { background: #D8F3DC; color: #40916C; }
.plan-card .plan-icon.safety { background: #E0F0FF; color: #4EA8DE; }
.plan-card .plan-icon.featured { background: #FFF8E7; color: #E5A020; }
.plan-card .plan-info { flex: 1; min-width: 0; }
.plan-card .plan-title { font-size: 15px; font-weight: 800; margin-bottom: 4px; line-height: 1.3; }
.plan-card .plan-meta { font-size: 11px; color: var(--tl); line-height: 1.5; }
.plan-card .plan-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.plan-card .plan-tag { font-size: 10px; padding: 2px 8px; border-radius: 8px; font-weight: 700; }
.plan-card .plan-tag.grade { background: var(--bl); color: #3B82F6; }
.plan-card .plan-tag.cat { background: var(--pghost); color: var(--pd); }
.plan-card .plan-tag.lessons { background: #f0f0f0; color: var(--ts); }
.plan-card .plan-tag.semester { background: #FFF; color: var(--ts); border: 1px solid var(--border); }
.plan-card .plan-tag.featured-t { background: var(--al); color: var(--ad); }
.plan-card .plan-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }
.plan-card .plan-size { font-size: 11px; color: var(--tl); }
.plan-card .dl-btn {
  padding: 8px 18px; border-radius: 10px; border: none; font-size: 12px; font-weight: 700;
  cursor: pointer; transition: all .2s; display: flex; align-items: center; gap: 5px;
}
.plan-card .dl-btn.pdf { background: #FFE0E0; color: #EF4444; }
.plan-card .dl-btn.pdf:hover { background: #EF4444; color: #fff; }
.plan-card .dl-btn.docx { background: #E0F0FF; color: #3B82F6; }
.plan-card .dl-btn.docx:hover { background: #3B82F6; color: #fff; }
.plan-card .dl-btn.ppt { background: #FFF0D1; color: #E5A020; }
.plan-card .dl-btn.ppt:hover { background: #E5A020; color: #fff; }
.plan-card .dl-btn.html { background: #E8F8F0; color: #52B788; }
.plan-card .dl-btn.html:hover { background: #52B788; color: #fff; }

/* 空状态 */
.empty-state { text-align: center; padding: 60px 20px; color: var(--tl); }
.empty-state .icon { font-size: 56px; margin-bottom: 14px; }
.empty-state p { font-size: 14px; }

/* 响应式 */
@media(max-width:600px){
  .page-header { flex-direction: column; text-align: center; }
  .plan-grid { grid-template-columns: 1fr; }
  .unit-grid { grid-template-columns: 1fr; }
  .search-input { width: 100%; }
  .filter-row { justify-content: flex-start; }
  .info-bar { flex-direction: column; gap: 6px; align-items: flex-start; }
}