/* ================================================================
   图片管理系统 · 样式表
   域名: zl.bjsczx.com
================================================================ */

/* ── CSS 变量 ────────────────────────────────────────────── */
:root {
  --c-bg: #f8fafc;
  --c-surface: #ffffff;
  --c-surface2: #f1f5f9;
  --c-border: #e2e8f0;
  --c-text: #1e293b;
  --c-text-2: #64748b;
  --c-text-3: #94a3b8;
  --c-primary: #6366f1;
  --c-primary-hover: #4f46e5;
  --c-primary-light: #eef2ff;
  --c-danger: #ef4444;
  --c-danger-hover: #dc2626;
  --c-success: #10b981;
  --c-warning: #f59e0b;
  --c-shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --c-shadow-md: 0 4px 16px rgba(0,0,0,.10);
  --c-shadow-lg: 0 20px 60px rgba(0,0,0,.15);
  --sidebar-w: 260px;
  --radius: 12px;
  --radius-sm: 8px;
  --topbar-h: 64px;
  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

[data-theme="dark"] {
  --c-bg: #0f172a;
  --c-surface: #1e293b;
  --c-surface2: #2d3a4f;
  --c-border: #334155;
  --c-text: #f1f5f9;
  --c-text-2: #94a3b8;
  --c-text-3: #475569;
  --c-primary: #818cf8;
  --c-primary-hover: #6366f1;
  --c-primary-light: #1e1b4b;
  --c-shadow: 0 1px 3px rgba(0,0,0,.3);
  --c-shadow-md: 0 4px 16px rgba(0,0,0,.4);
  --c-shadow-lg: 0 20px 60px rgba(0,0,0,.5);
}

/* ── 重置 ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--c-primary); text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; outline: none; }
img { max-width: 100%; display: block; }
.hidden { display: none !important; }

/* ── 玻璃态 ──────────────────────────────────────────────── */
.glass-card {
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(255,255,255,0.4);
  box-shadow: var(--c-shadow-lg);
}
[data-theme="dark"] .glass-card {
  background: rgba(30,41,59,0.8);
  border: 1px solid rgba(255,255,255,0.08);
}

/* ── 按钮 ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; border-radius: var(--radius-sm);
  font-weight: 500; font-size: .875rem;
  transition: all var(--transition); cursor: pointer; border: none;
  white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-hover); box-shadow: 0 4px 14px rgba(99,102,241,.35); transform: translateY(-1px); }
.btn-secondary { background: var(--c-surface2); color: var(--c-text); border: 1px solid var(--c-border); }
.btn-secondary:hover { background: var(--c-border); }
.btn-danger { background: var(--c-danger); color: #fff; }
.btn-danger:hover { background: var(--c-danger-hover); }
.btn-sm { padding: 6px 12px; font-size: .8125rem; }
.btn-full { width: 100%; justify-content: center; padding: 12px; }
.btn-icon {
  width: 34px; height: 34px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-text-2); transition: all var(--transition);
}
.btn-icon:hover { background: var(--c-surface2); color: var(--c-text); }

/* ── 表单 ────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .875rem; font-weight: 500; color: var(--c-text-2); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
input[type="text"], input[type="password"], select, textarea {
  background: var(--c-surface2);
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--c-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
input[type="text"]:focus, input[type="password"]:focus, select:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
  background: var(--c-surface);
}
.input-password { position: relative; }
.input-password input { padding-right: 42px; }
.toggle-pw {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  color: var(--c-text-3); padding: 4px; border-radius: 4px;
}
.toggle-pw:hover { color: var(--c-text); }
.filter-select {
  padding: 8px 12px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--c-border); background: var(--c-surface);
  color: var(--c-text); cursor: pointer;
}
.toggle-switch { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.toggle-switch input { display: none; }
.toggle-slider {
  width: 42px; height: 22px; background: var(--c-border);
  border-radius: 11px; position: relative; transition: background var(--transition);
}
.toggle-slider::after {
  content: ''; position: absolute; width: 18px; height: 18px;
  background: #fff; border-radius: 50%; top: 2px; left: 2px;
  transition: transform var(--transition); box-shadow: 0 1px 3px rgba(0,0,0,.2);
}
.toggle-switch input:checked + .toggle-slider { background: var(--c-primary); }
.toggle-switch input:checked + .toggle-slider::after { transform: translateX(20px); }
.toggle-label { font-size: .875rem; color: var(--c-text-2); }

/* ── Auth 页面 ───────────────────────────────────────────── */
.auth-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.auth-bg { position: absolute; inset: 0; pointer-events: none; }
.auth-blob {
  position: absolute; border-radius: 50%; filter: blur(80px); opacity: .35;
  animation: blob-float 8s ease-in-out infinite;
}
.blob1 { width: 400px; height: 400px; background: #a78bfa; top: -100px; left: -100px; }
.blob2 { width: 300px; height: 300px; background: #38bdf8; bottom: -80px; right: 10%; animation-delay: -3s; }
.blob3 { width: 250px; height: 250px; background: #34d399; top: 40%; right: -60px; animation-delay: -6s; }
@keyframes blob-float {
  0%, 100% { transform: translate(0,0) scale(1); }
  33% { transform: translate(20px,-20px) scale(1.05); }
  66% { transform: translate(-15px,15px) scale(.95); }
}
.auth-card {
  width: 100%; max-width: 400px; padding: 40px; border-radius: 20px;
  position: relative; z-index: 1;
}
.auth-logo {
  display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: 700;
  color: var(--c-primary); margin-bottom: 28px; justify-content: center;
}
.auth-logo i { font-size: 1.5rem; }
.auth-tabs { display: flex; gap: 4px; background: var(--c-surface2); padding: 4px; border-radius: var(--radius-sm); margin-bottom: 24px; }
.auth-tab {
  flex: 1; padding: 8px; border-radius: 6px; font-weight: 500; font-size: .875rem;
  color: var(--c-text-2); transition: all var(--transition);
}
.auth-tab.active { background: var(--c-surface); color: var(--c-primary); box-shadow: var(--c-shadow); }
.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-msg {
  margin-top: 12px; padding: 10px 14px; border-radius: var(--radius-sm);
  font-size: .875rem; text-align: center;
}
.auth-msg.error { background: #fef2f2; color: var(--c-danger); border: 1px solid #fecaca; }
.auth-msg.success { background: #f0fdf4; color: var(--c-success); border: 1px solid #bbf7d0; }
[data-theme="dark"] .auth-msg.error { background: rgba(239,68,68,.15); border-color: rgba(239,68,68,.3); }
[data-theme="dark"] .auth-msg.success { background: rgba(16,185,129,.15); border-color: rgba(16,185,129,.3); }

/* ── 布局 ────────────────────────────────────────────────── */
.app { display: flex; height: 100vh; overflow: hidden; }

/* ── 侧边栏 ──────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  background: var(--c-surface);
  border-right: 1px solid var(--c-border);
  display: flex; flex-direction: column;
  transition: transform var(--transition), width var(--transition);
  overflow: hidden; z-index: 100;
}
.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 16px; border-bottom: 1px solid var(--c-border);
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 1rem; color: var(--c-primary);
}
.logo i { font-size: 1.2rem; }
.sidebar-user {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; border-bottom: 1px solid var(--c-border);
}
.user-avatar { font-size: 1.8rem; color: var(--c-primary); flex-shrink: 0; }
.user-info { flex: 1; min-width: 0; }
.user-name { display: block; font-weight: 600; font-size: .875rem; truncate: ellipsis; overflow: hidden; white-space: nowrap; }
.user-role { display: block; font-size: .75rem; color: var(--c-text-3); }
.sidebar-nav { padding: 12px 10px; display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  font-size: .875rem; font-weight: 500; color: var(--c-text-2);
  transition: all var(--transition); width: 100%; text-align: left;
}
.nav-item:hover { background: var(--c-surface2); color: var(--c-text); }
.nav-item.active { background: var(--c-primary-light); color: var(--c-primary); font-weight: 600; }
.nav-item i { width: 18px; text-align: center; flex-shrink: 0; }
.sidebar-folders {
  flex: 1; overflow-y: auto; padding: 10px;
  border-top: 1px solid var(--c-border);
}
.sidebar-folders-header {
  display: flex; align-items: center; justify-content: space-between;
  font-size: .75rem; font-weight: 600; color: var(--c-text-3);
  text-transform: uppercase; letter-spacing: .06em;
  padding: 8px 6px; margin-bottom: 4px;
}
.folder-tree { display: flex; flex-direction: column; gap: 1px; }
.folder-tree-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: var(--radius-sm);
  font-size: .8125rem; color: var(--c-text-2);
  cursor: pointer; transition: all var(--transition);
  position: relative;
}
.folder-tree-item:hover { background: var(--c-surface2); color: var(--c-text); }
.folder-tree-item.active { background: var(--c-primary-light); color: var(--c-primary); }
.folder-tree-item .folder-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.sidebar-bottom { padding: 14px 16px; border-top: 1px solid var(--c-border); }
.theme-switcher { display: flex; gap: 4px; background: var(--c-surface2); padding: 4px; border-radius: var(--radius-sm); }
.theme-btn {
  flex: 1; padding: 6px; border-radius: 6px; font-size: .8125rem;
  color: var(--c-text-3); transition: all var(--transition);
}
.theme-btn.active, .theme-btn:hover { background: var(--c-surface); color: var(--c-primary); box-shadow: var(--c-shadow); }

/* ── 主内容区 ─────────────────────────────────────────────── */
.main-content {
  flex: 1; display: flex; flex-direction: column;
  overflow: hidden; min-width: 0;
}
.topbar {
  height: var(--topbar-h); flex-shrink: 0;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px; gap: 16px;
}
.topbar-left { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.topbar-right { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.search-box {
  display: flex; align-items: center; gap: 8px;
  background: var(--c-surface2); border: 1.5px solid var(--c-border);
  border-radius: 40px; padding: 7px 14px; flex: 1; max-width: 360px;
  transition: all var(--transition);
}
.search-box:focus-within { border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(99,102,241,.12); background: var(--c-surface); }
.search-box i { color: var(--c-text-3); flex-shrink: 0; }
.search-box input { border: none; background: none; flex: 1; color: var(--c-text); font-size: .875rem; }
.search-clear { color: var(--c-text-3); padding: 2px 4px; border-radius: 4px; }
.filter-group { display: flex; gap: 8px; }
.view-toggle { display: flex; gap: 2px; background: var(--c-surface2); padding: 3px; border-radius: var(--radius-sm); }
.view-btn { padding: 5px 9px; border-radius: 6px; color: var(--c-text-3); font-size: .8125rem; transition: all var(--transition); }
.view-btn.active { background: var(--c-surface); color: var(--c-primary); box-shadow: var(--c-shadow); }
.mobile-menu-btn { display: none; }

/* ── 内容区域 ─────────────────────────────────────────────── */
.view-section {
  flex: 1; overflow-y: auto; padding: 24px;
  display: flex; flex-direction: column; gap: 20px;
}
.view-section.active { display: flex; }
.section-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.section-header h2 { font-size: 1.25rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.section-header h2 i { color: var(--c-primary); }
.section-header p { color: var(--c-text-2); font-size: .875rem; margin-top: 4px; }

/* ── 面包屑 ───────────────────────────────────────────────── */
.gallery-breadcrumb { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.breadcrumb-item {
  display: flex; align-items: center; gap: 5px;
  font-size: .8125rem; color: var(--c-text-2); cursor: pointer;
  padding: 4px 8px; border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.breadcrumb-item:hover { background: var(--c-surface2); color: var(--c-text); }
.breadcrumb-item.active { color: var(--c-primary); font-weight: 600; background: var(--c-primary-light); }
.breadcrumb-sep { color: var(--c-text-3); }

/* ── 画廊网格 ─────────────────────────────────────────────── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.gallery-grid.list-mode {
  grid-template-columns: 1fr;
  gap: 8px;
}

.img-card {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
}
.img-card:hover { box-shadow: var(--c-shadow-md); border-color: var(--c-primary); transform: translateY(-2px); }
.img-card.selected { border-color: var(--c-primary); box-shadow: 0 0 0 2px rgba(99,102,241,.3); }
.img-card.drag-over { border-color: var(--c-primary); background: var(--c-primary-light); }
.img-card-thumb {
  aspect-ratio: 4/3; background: var(--c-surface2);
  position: relative; overflow: hidden;
}
.img-card-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s ease;
}
.img-card:hover .img-card-thumb img { transform: scale(1.05); }
.img-card-check {
  position: absolute; top: 8px; left: 8px; z-index: 2;
  width: 22px; height: 22px; border-radius: 50%;
  background: rgba(255,255,255,.9); border: 2px solid var(--c-border);
  display: flex; align-items: center; justify-content: center;
  font-size: .65rem; color: transparent; transition: all var(--transition);
  box-shadow: var(--c-shadow);
}
.img-card.selected .img-card-check,
.img-card:hover .img-card-check { border-color: var(--c-primary); }
.img-card.selected .img-card-check { background: var(--c-primary); color: #fff; }
.img-card-overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center; gap: 8px;
  opacity: 0; transition: opacity var(--transition);
}
.img-card:hover .img-card-overlay { opacity: 1; }
.img-card-overlay .btn-icon { background: rgba(255,255,255,.9); color: #1e293b; width: 36px; height: 36px; }
.img-card-overlay .btn-icon:hover { background: #fff; transform: scale(1.1); }
.img-card-info { padding: 10px 12px; }
.img-card-name {
  font-size: .8125rem; font-weight: 500; color: var(--c-text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block;
}
.img-card-meta { font-size: .75rem; color: var(--c-text-3); margin-top: 2px; }
.img-card-badge {
  position: absolute; top: 8px; right: 8px;
  background: rgba(16,185,129,.9); color: #fff;
  font-size: .65rem; font-weight: 600; padding: 2px 6px;
  border-radius: 10px;
}

/* 列表模式 */
.gallery-grid.list-mode .img-card { display: flex; align-items: center; gap: 14px; }
.gallery-grid.list-mode .img-card-thumb { width: 60px; height: 44px; aspect-ratio: unset; flex-shrink: 0; border-radius: var(--radius-sm); }
.gallery-grid.list-mode .img-card-info { flex: 1; padding: 0; }
.gallery-grid.list-mode .img-card-overlay { display: none; }
.gallery-grid.list-mode .img-card-actions {
  display: flex; gap: 6px; padding-right: 12px;
}
.img-card-actions { display: none; }

/* ── 上传区域 ─────────────────────────────────────────────── */
.upload-area {
  border: 2px dashed var(--c-border);
  border-radius: var(--radius);
  padding: 60px 40px; text-align: center;
  background: var(--c-surface);
  transition: all var(--transition);
  cursor: pointer;
}
.upload-area:hover, .upload-area.drag-over {
  border-color: var(--c-primary);
  background: var(--c-primary-light);
}
.upload-icon { font-size: 3.5rem; color: var(--c-primary); margin-bottom: 16px; opacity: .7; }
.upload-text { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-bottom: 12px; }
.upload-text strong { font-size: 1.1rem; color: var(--c-text); }
.upload-text span { color: var(--c-text-3); }
.upload-btn-label { cursor: pointer; }
.upload-hint { font-size: .8125rem; color: var(--c-text-3); }
.upload-options { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 20px; }
.upload-preview { display: flex; flex-wrap: wrap; gap: 16px; }
.preview-item {
  display: flex; flex-direction: column;
  width: 200px; border-radius: var(--radius); overflow: hidden;
  background: var(--c-surface); border: 1px solid var(--c-border);
  transition: box-shadow .2s;
}
.preview-item:hover { box-shadow: 0 4px 12px rgba(0,0,0,.1); }
.preview-img-wrap { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--c-surface2); }
.preview-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.preview-item-remove {
  position: absolute; top: 6px; right: 6px;
  width: 24px; height: 24px; border-radius: 50%;
  background: rgba(239,68,68,.9); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: .7rem; border: none; cursor: pointer;
  opacity: 0; transition: opacity .2s;
}
.preview-item:hover .preview-item-remove { opacity: 1; }
.preview-item-info { padding: 10px 12px; flex: 1; }
.preview-item-name {
  display: block; color: var(--c-text); font-size: .8rem;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  margin-bottom: 6px;
}
.upload-status {
  display: flex; align-items: center; gap: 6px;
  font-size: .75rem; color: var(--c-text-3);
}
.upload-status .fa-circle-check { color: var(--c-success); }
.upload-status .fa-circle-xmark { color: var(--c-danger); }
.upload-link-area {
  display: flex; gap: 4px; margin-top: 8px;
}
.upload-link-input {
  flex: 1; padding: 4px 6px; font-size: .7rem;
  border: 1px solid var(--c-border); border-radius: 4px;
  background: var(--c-bg); color: var(--c-primary);
  font-family: monospace; min-width: 0;
}
.copy-link-btn {
  padding: 4px 8px; font-size: .7rem;
  background: var(--c-surface2); border: 1px solid var(--c-border);
  border-radius: 4px; cursor: pointer; color: var(--c-text);
}
.copy-link-btn:hover { background: var(--c-border); }
/* 上传状态颜色 */
.preview-item.upload-pending { border-color: var(--c-primary); }
.preview-item.upload-success { border-color: var(--c-success); }
.preview-item.upload-error { border-color: var(--c-danger); }
.upload-results { display: flex; flex-direction: column; gap: 8px; }
.upload-result-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; border-radius: var(--radius-sm);
  background: var(--c-surface2); font-size: .8125rem;
}
.upload-result-item.success { border-left: 3px solid var(--c-success); }
.upload-result-item.error { border-left: 3px solid var(--c-danger); }
.result-url { color: var(--c-primary); font-family: monospace; font-size: .75rem; flex: 1; margin: 0 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-progress {
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 3px; background: var(--c-primary);
  transform-origin: left; animation: progress-grow .8s ease;
}
@keyframes progress-grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* ── 文件夹网格 ───────────────────────────────────────────── */
.folders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}
.folder-card {
  background: var(--c-surface); border: 1.5px solid var(--c-border);
  border-radius: var(--radius); padding: 20px 16px;
  text-align: center; cursor: pointer;
  transition: all var(--transition); position: relative;
}
.folder-card:hover { box-shadow: var(--c-shadow-md); transform: translateY(-2px); }
.folder-card.drag-target { border-color: var(--c-primary); background: var(--c-primary-light); }
.folder-card-icon { font-size: 2.5rem; margin-bottom: 10px; }
.folder-card-name {
  font-size: .875rem; font-weight: 600; color: var(--c-text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.folder-card-meta { font-size: .75rem; color: var(--c-text-3); margin-top: 4px; }
.folder-card-actions {
  position: absolute; top: 8px; right: 8px;
  display: flex; gap: 4px; opacity: 0; transition: opacity var(--transition);
}
.folder-card:hover .folder-card-actions { opacity: 1; }

/* ── 分页 ────────────────────────────────────────────────── */
.pagination { display: flex; justify-content: center; align-items: center; gap: 6px; padding: 12px 0; }
.page-btn {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: .875rem; color: var(--c-text-2);
  border: 1.5px solid var(--c-border); background: var(--c-surface);
  transition: all var(--transition); cursor: pointer;
}
.page-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.page-btn.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.page-btn:disabled { opacity: .4; cursor: not-allowed; }
.page-info { font-size: .8125rem; color: var(--c-text-2); padding: 0 8px; }

/* ── 空状态 & 加载 ────────────────────────────────────────── */
.empty-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 60px 20px; color: var(--c-text-3); gap: 12px; text-align: center;
}
.empty-state i { font-size: 4rem; opacity: .4; }
.empty-state h3 { font-size: 1.1rem; color: var(--c-text-2); }
.empty-state p { font-size: .875rem; }
.loading-state { display: flex; justify-content: center; padding: 40px; }
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--c-border);
  border-top-color: var(--c-primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Modal ───────────────────────────────────────────────── */
.modal {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  animation: modal-in .18s ease;
}
@keyframes modal-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.5);
  backdrop-filter: blur(4px);
}
.modal-content {
  position: relative; z-index: 1;
  background: var(--c-surface); border-radius: 16px;
  box-shadow: var(--c-shadow-lg);
  animation: modal-slide .2s cubic-bezier(0.4,0,0.2,1);
  max-width: 90vw;
}
@keyframes modal-slide {
  from { transform: translateY(20px) scale(.97); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px 0; font-size: 1rem; font-weight: 700;
}
.modal-footer {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 20px 24px 24px;
}
.modal-close { color: var(--c-text-3); }
.modal-close:hover { color: var(--c-text); }

/* 预览 Modal */
.preview-content {
  width: 90vw; max-width: 960px;
  display: flex; flex-direction: column;
}
.preview-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--c-border);
  flex-wrap: wrap; gap: 10px;
}
.preview-info h3 { font-size: .95rem; font-weight: 600; }
.preview-info span { font-size: .8125rem; color: var(--c-text-3); }
.preview-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.preview-body {
  position: relative; display: flex; align-items: center;
  min-height: 300px; max-height: 60vh; overflow: hidden;
  background: var(--c-surface2);
}
.preview-img-wrap {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 20px; height: 100%;
}
.preview-img-wrap img { max-height: 55vh; max-width: 100%; object-fit: contain; border-radius: 4px; }
.preview-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,255,255,.9); color: #1e293b;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--c-shadow-md); transition: all var(--transition); z-index: 2;
}
.prev-btn { left: 12px; }
.next-btn { right: 12px; }
.preview-nav:hover { background: #fff; transform: translateY(-50%) scale(1.1); }
.preview-url-box { padding: 12px 20px; border-top: 1px solid var(--c-border); }
.preview-url-box input {
  width: 100%; font-size: .8125rem; font-family: monospace;
  background: var(--c-surface2); border: 1px solid var(--c-border);
  border-radius: var(--radius-sm); padding: 8px 12px; color: var(--c-primary);
}

/* 文件夹 Modal */
.folder-modal-content { width: 400px; }
.folder-modal-content form { padding: 20px 24px; display: flex; flex-direction: column; gap: 16px; }
.color-picker { display: flex; gap: 8px; flex-wrap: wrap; }
.color-opt {
  width: 28px; height: 28px; border-radius: 50%;
  border: 2px solid transparent; transition: all var(--transition); cursor: pointer;
}
.color-opt.active, .color-opt:hover { border-color: var(--c-text); transform: scale(1.15); }

/* 确认 Modal */
.confirm-content { padding: 32px 28px; text-align: center; width: 340px; }
.confirm-icon { font-size: 3rem; color: var(--c-warning); margin-bottom: 12px; }
.confirm-content h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.confirm-content p { font-size: .875rem; color: var(--c-text-2); margin-bottom: 24px; }

/* ── Toast ───────────────────────────────────────────────── */
.toast-container {
  position: fixed; bottom: 24px; right: 24px; z-index: 2000;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-radius: var(--radius);
  background: var(--c-surface); color: var(--c-text);
  box-shadow: var(--c-shadow-lg); border: 1px solid var(--c-border);
  font-size: .875rem; min-width: 260px; max-width: 380px;
  animation: toast-in .25s cubic-bezier(0.4,0,0.2,1);
  transition: opacity .3s, transform .3s;
}
.toast.out { opacity: 0; transform: translateX(20px); }
@keyframes toast-in { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
.toast-success { border-left: 3px solid var(--c-success); }
.toast-error { border-left: 3px solid var(--c-danger); }
.toast-info { border-left: 3px solid var(--c-primary); }
.toast-icon { flex-shrink: 0; }
.toast-success .toast-icon { color: var(--c-success); }
.toast-error .toast-icon { color: var(--c-danger); }
.toast-info .toast-icon { color: var(--c-primary); }
.toast-close { margin-left: auto; color: var(--c-text-3); font-size: .75rem; }

/* ── 拖拽 ────────────────────────────────────────────────── */
.img-card[draggable="true"] { user-select: none; }
.img-card.dragging { opacity: .4; }
.drag-indicator {
  position: fixed; z-index: 3000;
  background: var(--c-primary); color: #fff;
  padding: 6px 12px; border-radius: 8px;
  font-size: .8125rem; font-weight: 500;
  pointer-events: none; box-shadow: var(--c-shadow-md);
}

/* ── 响应式 ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    transform: translateX(-100%); z-index: 200;
  }
  .sidebar.open { transform: translateX(0); box-shadow: var(--c-shadow-lg); }
  .mobile-menu-btn { display: flex; }
  .main-content { width: 100%; }
  .topbar { padding: 0 12px; }
  .filter-group { display: none; }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .view-section { padding: 16px; }
  .preview-content { width: 96vw; }
  .form-row { grid-template-columns: 1fr; }
  .preview-actions { gap: 4px; }
  .preview-actions .btn span:not(.fa-solid):not(.fa-regular) { display: none; }
}
@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .folders-grid { grid-template-columns: repeat(2, 1fr); }
  .auth-card { padding: 28px 20px; }
}

/* ── 自定义滚动条 ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-text-3); }

/* ── 打印样式 ─────────────────────────────────────────────── */
@media print {
  .sidebar, .topbar, .modal { display: none; }
  .main-content { overflow: visible; }
}