/* 享学素材管理系统 · 全局样式 */
:root {
  --primary: #576FF8;
  --primary-dark: #1D4ED8;
  --bg: #F6F7FB;
  --surface: #FFFFFF;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --border: #E5E7EB;
  --success: #16A34A;
  --warning: #D97706;
  --danger: #DC2626;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(17, 24, 39, 0.08), 0 4px 12px rgba(17, 24, 39, 0.04);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--primary-dark); text-decoration: none; }

/* ---------- 布局 ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px 18px;
  font-weight: 700;
  font-size: 17px;
}

.brand svg { width: 28px; height: 28px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 14px;
  transition: all .15s;
}

.nav-item:hover { background: #F3F4F6; color: var(--text); }
.nav-item.active { background: #EEF1FF; color: var(--primary-dark); font-weight: 600; }

.nav-version {
  margin-top: auto;
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.main {
  flex: 1;
  padding: 28px 36px;
  max-width: 1280px;
}

.page-header { margin-bottom: 22px; }
.page-header h1 { font-size: 24px; font-weight: 700; }
.page-header p { color: var(--text-secondary); margin-top: 6px; font-size: 14px; }

/* ---------- 统计卡片 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 26px;
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.stat-card .num { font-size: 32px; font-weight: 700; }
.stat-card .label { color: var(--text-secondary); font-size: 13px; margin-top: 4px; }
.stat-card.accent { background: linear-gradient(135deg, #576FF8, #7C8DFB); color: #fff; }
.stat-card.accent .label { color: rgba(255,255,255,.85); }

/* ---------- 筛选工具栏 ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 18px;
}

.tabs { display: flex; gap: 6px; background: var(--surface); padding: 5px; border-radius: 10px; box-shadow: var(--shadow); }

.tab {
  padding: 7px 16px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
}

.tab.active { background: var(--primary); color: #fff; }

.search-input {
  flex: 1;
  min-width: 200px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  background: var(--surface);
}

.search-input:focus { outline: 2px solid #C7D0FF; border-color: var(--primary); }

.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  transition: all .15s;
}

.btn:hover { border-color: var(--primary); color: var(--primary-dark); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-dark); color: #fff; }
.btn.danger { color: var(--danger); border-color: #FECACA; }
.btn.danger:hover { background: #FEF2F2; border-color: var(--danger); }
.btn.sm { padding: 5px 10px; font-size: 12px; border-radius: 8px; }

select.input {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  background: var(--surface);
}

/* ---------- 素材卡片网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.material-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  position: relative;
}

.material-card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(17, 24, 39, .12); }

.card-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 10px; }

.kind-badge {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}

.kind-theme { background: #EEF1FF; color: var(--primary-dark); }
.kind-skill { background: #ECFDF5; color: #059669; }
.kind-note_template { background: #FEF9C3; color: #854D0E; }
.kind-prompt { background: #FDF2F8; color: #BE185D; }
.kind-other { background: #F3F4F6; color: #4B5563; }

.status-dot {
  width: 9px; height: 9px; border-radius: 50%; display: inline-block;
}

.status-published { background: var(--success); }
.status-draft { background: var(--warning); }
.status-archived { background: #9CA3AF; }

.material-card h3 { font-size: 16px; margin-bottom: 6px; }
.material-card .desc {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.5;
  min-height: 40px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 14px; padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 12px; color: var(--text-secondary);
}

/* 主题色预览条 */
.theme-swatch {
  display: flex; gap: 4px; margin-top: 12px; height: 22px; align-items: stretch;
}

.theme-swatch span { flex: 1; border-radius: 4px; }

/* ---------- 详情页 ---------- */
.detail-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

.detail-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 18px; }

.detail-meta { font-size: 13px; color: var(--text-secondary); line-height: 2; }
.detail-meta b { color: var(--text); font-weight: 600; margin-right: 6px; }

/* 主题预览 */
.theme-preview { padding: 24px; border-radius: var(--radius); border: 1px solid var(--border); }
.theme-preview h1 { font-size: 22px; margin-bottom: 12px; padding: 8px 12px; border-radius: 8px; }
.theme-preview h2 { font-size: 18px; margin: 16px 0 8px; }
.theme-preview h3 { font-size: 15px; margin: 12px 0 6px; }
.theme-preview blockquote { padding: 8px 14px; border-radius: 8px; margin: 10px 0; }
.theme-preview ul { padding-left: 22px; }
.theme-preview hr { border: none; height: 2px; margin: 14px 0; }

/* Markdown 渲染 */
.md-body { line-height: 1.7; font-size: 14px; }
.md-body h1, .md-body h2, .md-body h3 { margin: 16px 0 8px; }
.md-body p { margin: 8px 0; }
.md-body ul, .md-body ol { padding-left: 24px; margin: 8px 0; }
.md-body code { background: #F3F4F6; padding: 2px 6px; border-radius: 5px; font-size: 13px; }
.md-body pre { background: #111827; color: #E5E7EB; padding: 14px; border-radius: 10px; overflow-x: auto; margin: 10px 0; }
.md-body pre code { background: transparent; color: inherit; }
.md-body blockquote { border-left: 3px solid var(--primary); padding: 6px 14px; background: #F8FAFF; border-radius: 0 8px 8px 0; margin: 10px 0; color: var(--text-secondary); }
.md-body table { border-collapse: collapse; margin: 10px 0; width: 100%; }
.md-body th, .md-body td { border: 1px solid var(--border); padding: 7px 10px; font-size: 13px; }
.md-body th { background: #F9FAFB; }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.form-item { display: flex; flex-direction: column; gap: 6px; }
.form-item.full { grid-column: 1 / -1; }
.form-item label { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.form-item input, .form-item textarea, .form-item select {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  background: var(--surface);
}
.form-item input:focus, .form-item textarea:focus { outline: 2px solid #C7D0FF; border-color: var(--primary); }
.form-item textarea { min-height: 90px; resize: vertical; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all .15s;
  background: var(--surface);
}

.dropzone:hover, .dropzone.dragover { border-color: var(--primary); background: #F8FAFF; }

/* ---------- 提示 ---------- */
.toast {
  position: fixed;
  top: 20px; right: 20px;
  background: var(--text);
  color: #fff;
  padding: 11px 18px;
  border-radius: 10px;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
  z-index: 999;
  opacity: 0;
  transform: translateY(-8px);
  transition: all .25s;
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

.empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 60px 0;
  grid-column: 1 / -1;
}

.muted { color: var(--text-secondary); font-size: 13px; }

/* 响应式 */
@media (max-width: 860px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; flex-direction: row; flex-wrap: wrap; }
  .nav-version { display: none; }
  .main { padding: 18px; }
  .detail-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
}