/* ===== 全局样式 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #ede9fe;
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #10b981;
  --bg: #f8fafc;
  --bg-card: #fff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --sidebar-w: 220px;
  --topbar-h: 56px;
  --shadow: 0 1px 3px rgba(0,0,0,.08);
  --radius: 8px;
}

body { font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }
a { text-decoration: none; color: inherit; }
input, select, button { font-family: inherit; font-size: 14px; }

/* ===== 登录 ===== */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.login-box { background: #fff; border-radius: 16px; padding: 48px 40px; width: 360px; box-shadow: 0 20px 60px rgba(0,0,0,.2); }
.login-logo { font-size: 32px; text-align: center; margin-bottom: 16px; }
.login-box h2 { text-align: center; font-size: 22px; margin-bottom: 32px; color: var(--text); }
.btn-block { width: 100%; }

/* ===== 顶栏 ===== */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h);
  background: #fff; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px; z-index: 100; box-shadow: var(--shadow);
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.topbar-right { display: flex; align-items: center; gap: 8px; }
.logo { font-size: 16px; font-weight: 700; color: var(--primary); }
.btn-icon { background: none; border: none; cursor: pointer; font-size: 20px; padding: 4px 8px; border-radius: 6px; }
.btn-icon:hover { background: var(--bg); }

/* ===== 布局 ===== */
.layout { display: flex; margin-top: var(--topbar-h); min-height: calc(100vh - var(--topbar-h)); }

/* ===== 侧边栏 ===== */
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  background: #fff; border-right: 1px solid var(--border);
  position: fixed; top: var(--topbar-h); bottom: 0; left: 0;
  overflow-y: auto; transition: transform .25s;
  z-index: 90; padding: 16px 0;
}
.sidebar.collapsed { transform: translateX(-100%); }
.content { flex: 1; margin-left: var(--sidebar-w); padding: 24px; transition: margin .25s; }
.content.expanded { margin-left: 0; }

.sidenav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px; color: var(--text-muted);
  border-radius: 0; transition: all .2s; cursor: pointer;
}
.sidenav-item:hover, .sidenav-item.active { color: var(--primary); background: var(--primary-light); }
.sidenav-item .icon { font-size: 18px; }

/* ===== 内容区 ===== */
.tab-pane { display: none; }
.tab-pane.active { display: block; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.page-header h2 { font-size: 20px; font-weight: 700; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== 表单 ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 500; margin-bottom: 6px; color: var(--text); }
.form-control {
  width: 100%; padding: 9px 12px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: #fff; color: var(--text); outline: none; transition: border .2s;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,.1); }
.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }
.form-row .half { flex: 1; min-width: 0; }
.upload-inline { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 8px 16px; border: none; border-radius: var(--radius);
  cursor: pointer; font-weight: 500; transition: all .2s; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #d97706; }
.btn-info { background: #6366f1; color: #fff; }
.btn-info:hover { background: #4f46e5; }
.btn-success { background: var(--success); color: #fff; }
.btn-outline { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-xs { padding: 3px 8px; font-size: 12px; }

/* ===== 图片网格 ===== */
.img-toolbar { display: flex; align-items: center; margin-bottom: 10px; }
.checkbox-label { display: flex; align-items: center; gap: 6px; cursor: pointer; user-select: none; }
.checkbox-label input { width: 16px; height: 16px; cursor: pointer; }

.batch-toolbar {
  display: flex; align-items: center; gap: 10px;
  background: var(--primary-light); border: 1px solid #c7d2fe;
  border-radius: var(--radius); padding: 10px 16px; margin-bottom: 12px; flex-wrap: wrap;
}
#selected-count { font-weight: 600; color: var(--primary); }

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.img-card {
  background: var(--bg-card); border: 2px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: all .2s; cursor: pointer;
  position: relative;
}
.img-card:hover { border-color: var(--primary); box-shadow: 0 4px 12px rgba(79,70,229,.15); }
.img-card.selected { border-color: var(--primary); background: var(--primary-light); }

.img-card-checkbox {
  position: absolute; top: 8px; left: 8px; z-index: 2;
  width: 20px; height: 20px; cursor: pointer; accent-color: var(--primary);
}
.img-thumb {
  width: 100%; height: 160px; object-fit: cover;
  background: #f1f5f9; display: block;
}
.img-no-thumb {
  width: 100%; height: 160px; display: flex; align-items: center;
  justify-content: center; background: #f1f5f9; font-size: 40px; color: #cbd5e1;
}
.img-info { padding: 10px; }
.img-title { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 13px; }
.img-meta { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.img-actions { display: flex; gap: 4px; padding: 0 10px 10px; }

/* ===== 分类管理 ===== */
.cat-list { display: flex; flex-direction: column; gap: 8px; }
.cat-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px;
  display: flex; align-items: center; gap: 12px;
}
.cat-item.child { margin-left: 32px; border-left: 3px solid var(--primary); }
.cat-name { flex: 1; font-weight: 600; }
.cat-badge { font-size: 12px; background: var(--primary-light); color: var(--primary); padding: 2px 8px; border-radius: 999px; }
.cat-actions { display: flex; gap: 6px; }

/* ===== 上传 ===== */
.upload-tabs { display: flex; gap: 0; margin-bottom: 20px; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; width: fit-content; }
.upload-tab { padding: 8px 20px; background: #fff; border: none; cursor: pointer; font-size: 14px; transition: all .2s; }
.upload-tab.active { background: var(--primary); color: #fff; }

.upload-area {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 40px; text-align: center; cursor: pointer;
  transition: all .2s; background: var(--bg);
}
.upload-area:hover { border-color: var(--primary); background: var(--primary-light); }
.upload-hint p { color: var(--text-muted); margin: 12px 0 16px; }

.upload-queue { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); gap: 12px; margin-top: 16px; }
.queue-item { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: #fff; }
.queue-thumb { width: 100%; height: 100px; object-fit: cover; }
.queue-name { padding: 6px 8px; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.queue-status { position: absolute; top: 4px; right: 4px; font-size: 18px; }
.queue-remove { position: absolute; top: 4px; left: 4px; background: rgba(0,0,0,.5); color: #fff; border: none; border-radius: 50%; width: 20px; height: 20px; cursor: pointer; font-size: 12px; display: flex; align-items: center; justify-content: center; }

/* ===== 设置 ===== */
.settings-form { max-width: 600px; }
.settings-section { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.settings-section h3 { font-size: 16px; margin-bottom: 20px; color: var(--text); padding-bottom: 12px; border-bottom: 1px solid var(--border); }

/* ===== 导入导出 ===== */
.io-section { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.io-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.io-card h3 { font-size: 16px; margin-bottom: 12px; }
.io-card p { color: var(--text-muted); margin-bottom: 16px; line-height: 1.6; }

/* ===== 弹窗 ===== */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.5);
  display: flex; align-items: center; justify-content: center; z-index: 200;
  animation: fadeIn .2s;
}
@keyframes fadeIn { from { opacity: 0 } to { opacity: 1 } }
.modal-box {
  background: #fff; border-radius: 12px; width: 520px; max-width: 95vw;
  max-height: 90vh; display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,.2); animation: slideUp .2s;
}
.modal-sm { width: 380px; }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0 } to { transform: translateY(0); opacity: 1 } }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 16px; }
.btn-close { background: none; border: none; cursor: pointer; font-size: 18px; color: var(--text-muted); padding: 4px; border-radius: 4px; }
.btn-close:hover { background: var(--bg); }
.modal-body { padding: 20px 24px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: #333; color: #fff; padding: 12px 24px; border-radius: 999px;
  font-size: 14px; z-index: 9999; transition: all .3s; opacity: 0;
  pointer-events: none; white-space: nowrap;
}
.toast.show { opacity: 1; }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

/* ===== 工具 ===== */
.mt2 { margin-top: 16px; }
.alert { padding: 10px 14px; border-radius: var(--radius); font-size: 13px; }
.alert-danger { background: #fef2f2; border: 1px solid #fecaca; color: #dc2626; }
.form-control-color { height: 38px; padding: 4px; cursor: pointer; }

/* ===== 空状态 ===== */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state .empty-icon { font-size: 64px; margin-bottom: 16px; }
.empty-state p { font-size: 16px; }

/* ===== 标签管理 ===== */
.tag-manage-section { }
.tag-manage-stats { margin-bottom: 20px; font-size: 14px; color: var(--text-muted); }
.tag-manage-stats p { }
.tag-cloud-full { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.tag-cloud-item {
  padding: 6px 14px; background: var(--primary-light); color: var(--primary);
  border-radius: 999px; cursor: pointer; transition: all .2s;
  font-weight: 600;
}
.tag-cloud-item:hover { background: var(--primary); color: #fff; transform: scale(1.05); }
.tag-cloud-item em { font-style: normal; font-size: .8em; opacity: .7; margin-left: 4px; }

/* 批量标签弹窗 */
.batch-tag-info { margin-bottom: 16px; font-size: 14px; color: var(--text-muted); }
.batch-tag-info strong { color: var(--primary); }
.existing-tags { margin-top: 12px; }
.existing-tags-label { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.existing-tags-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.existing-tag-chip {
  padding: 3px 10px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 999px; font-size: 12px; cursor: pointer; transition: all .2s; color: var(--text-muted);
}
.existing-tag-chip:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }

/* 编辑弹窗标签 */
.tag-suggestions { margin-top: 8px; }
.suggestions-label { font-size: 12px; color: var(--text-muted); margin-bottom: 6px; display: block; }
.suggestion-chip {
  display: inline-block; padding: 2px 8px; margin: 2px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 999px;
  font-size: 11px; cursor: pointer; transition: all .2s; color: var(--text-muted);
}
.suggestion-chip:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }

/* 图片卡片标签 */
.img-card-tags { display: flex; flex-wrap: wrap; gap: 3px; padding: 0 10px 8px; }
.img-card-tag { padding: 1px 5px; background: var(--primary-light); color: var(--primary); border-radius: 999px; font-size: 10px; }

/* 图片卡片的密码锁标识 */
.img-card-lock {
  position: absolute; top: 8px; right: 8px; z-index: 2;
  background: rgba(0,0,0,.55); color: #fff;
  border-radius: 6px; padding: 2px 6px; font-size: 12px; line-height: 1.6;
  pointer-events: none;
}

/* 分类列表的密码锁标识 */
.cat-lock-badge {
  display: inline-flex; align-items: center;
  background: rgba(239,68,68,.15); color: #dc2626;
  border-radius: 4px; padding: 1px 5px; font-size: 11px;
  margin-left: 6px; vertical-align: middle;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .content { margin-left: 0; }
  .image-grid { grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); }
}