/* ========== 主题变量 ========== */
:root {
  --bg: #f0f2f5;
  --bg-gradient: radial-gradient(ellipse at top, #f8f9fb 0%, #f0f2f5 50%, #e8ebf0 100%);
  --sidebar-bg: rgba(255,255,255,0.75);
  --card-bg: #ffffff;
  --card-bg-hover: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #86868b;
  --text-tertiary: #aeaeb2;
  --border: rgba(0,0,0,0.06);
  --border-strong: rgba(0,0,0,0.1);
  --accent: #0071e3;
  --accent-gradient: linear-gradient(135deg, #0071e3 0%, #4a9eff 100%);
  --accent-light: rgba(0, 113, 227, 0.08);
  --danger: #ff3b30;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 2px 8px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.08), 0 16px 48px rgba(0,0,0,0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  /* 间距系统（4px 基准） */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sidebar-w: 248px;
  /* 流式 padding */
  --pad-x: clamp(16px, 3vw, 40px);
  --pad-y: clamp(16px, 2vw, 24px);
}
[data-theme="dark"] {
  --bg: #0f0f11;
  --bg-gradient: radial-gradient(ellipse at top, #1c1c20 0%, #0f0f11 60%, #08080a 100%);
  --sidebar-bg: rgba(28,28,30,0.8);
  --card-bg: #1c1c1e;
  --card-bg-hover: #2c2c2e;
  --text: #f5f5f7;
  --text-secondary: #98989d;
  --text-tertiary: #636366;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.12);
  --accent: #0a84ff;
  --accent-gradient: linear-gradient(135deg, #0a84ff 0%, #6ab8ff 100%);
  --accent-light: rgba(10, 132, 255, 0.15);
  --danger: #ff453a;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 2px 8px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.4), 0 16px 48px rgba(0,0,0,0.3);
}

/* ========== 基础重置 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; }

/* ========== 视图切换 ========== */
.view { display: none; height: 100vh; overflow: hidden; }
.view.active { display: flex; }

/* ========== 首页布局 ========== */
.app { display: flex; height: 100%; overflow: hidden; width: 100%; }

/* ========== 侧边栏 ========== */
.sidebar {
  width: var(--sidebar-w); min-width: var(--sidebar-w);
  background: var(--sidebar-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: transform var(--transition), background var(--transition);
  z-index: 100;
}
.sidebar-header { padding: 24px 20px 12px; display: flex; align-items: center; gap: 10px; }
.sidebar-logo {
  width: 34px; height: 34px; border-radius: 10px;
  background: var(--accent-gradient);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 16px; flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,113,227,0.3);
}
.sidebar-title { font-size: 17px; font-weight: 700; letter-spacing: -0.02em; }

.sidebar-label {
  padding: 14px 20px 4px; font-size: 11px; font-weight: 600;
  color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.08em;
}

.category-list { flex: 1; overflow-y: auto; padding: 4px 12px; }
.category-list::-webkit-scrollbar { width: 4px; }
.category-list::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 2px; }

.category-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: var(--radius-sm);
  font-size: 14px; color: var(--text-secondary);
  cursor: pointer; transition: all var(--transition);
  margin-bottom: 2px; user-select: none; position: relative;
}
.category-item:hover { background: var(--accent-light); color: var(--text); }
.category-item.active {
  background: var(--accent-light); color: var(--accent); font-weight: 600;
}
.category-item.active::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 20px; border-radius: 0 3px 3px 0; background: var(--accent);
}
.category-item svg { width: 16px; height: 16px; flex-shrink: 0; }
.category-item .dot { width: 16px; text-align: center; color: var(--text-tertiary); flex-shrink: 0; font-size: 16px; }
.category-item .cat-count {
  margin-left: auto; font-size: 11px; font-weight: 500;
  padding: 2px 8px; border-radius: 10px;
  background: var(--border); color: var(--text-secondary);
}
.category-item.active .cat-count { background: var(--accent); color: #fff; }

.sidebar-footer {
  padding: 12px 16px 16px; border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 6px;
}
.btn-add, .btn-admin {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 16px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; transition: all var(--transition);
}
.btn-add {
  background: var(--accent-gradient); color: #fff;
  box-shadow: 0 2px 8px rgba(0,113,227,0.25);
}
.btn-add:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,113,227,0.35); }
.btn-admin {
  background: transparent; color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-admin:hover { background: var(--accent-light); color: var(--text); border-color: var(--border-strong); }
.btn-add svg, .btn-admin svg { width: 16px; height: 16px; }

.theme-toggle {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 13px; color: var(--text-secondary); transition: all var(--transition);
}
.theme-toggle:hover { background: var(--accent-light); color: var(--text); }
.theme-toggle svg { width: 15px; height: 15px; }

/* ========== 主内容区 ========== */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; background: var(--bg-gradient); }

.hero {
  padding: var(--pad-y) var(--pad-x);
  display: flex; flex-direction: row; align-items: center; gap: var(--sp-6);
  flex-shrink: 0; position: relative;
}
.hero-left { flex-shrink: 0; min-width: 140px; }
.hero-greeting {
  font-size: clamp(18px, 2vw, 22px); font-weight: 700; letter-spacing: -0.02em;
}
.hero-date { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }

.hero-search {
  flex: 1; max-width: 560px; position: relative; margin: 0 auto;
}
.hero-search svg {
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; color: var(--text-tertiary); pointer-events: none;
}
.hero-search input {
  width: 100%; padding: 12px 18px 12px 44px;
  border: 1px solid var(--border); border-radius: 14px;
  background: var(--card-bg); color: var(--text); font-size: 14px; outline: none;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.hero-search input::placeholder { color: var(--text-tertiary); }
.hero-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light), var(--shadow-sm);
}

.hero-right { flex-shrink: 0; display: flex; align-items: center; gap: 10px; }

.profile-btn {
  width: 38px; height: 38px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--card-bg); border: 1px solid var(--border);
  color: var(--text-secondary); transition: all var(--transition);
}
.profile-btn:hover {
  background: var(--accent-light); color: var(--accent);
  border-color: var(--accent);
}
.profile-btn svg { width: 18px; height: 18px; }
.sort-select {
  padding: 8px 32px 8px 14px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--card-bg); color: var(--text);
  font-size: 13px; outline: none; cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2386868b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
  transition: all var(--transition);
}
.sort-select:focus { border-color: var(--accent); }

.menu-toggle {
  display: none; width: 40px; height: 40px; border-radius: var(--radius-sm);
  align-items: center; justify-content: center; color: var(--text-secondary);
  background: var(--card-bg); border: 1px solid var(--border);
  flex-shrink: 0;
}
.menu-toggle:hover { background: var(--accent-light); color: var(--text); }
.menu-toggle svg { width: 20px; height: 20px; }

/* ========== 内容区 ========== */
.content { flex: 1; overflow-y: auto; padding: var(--sp-2) var(--pad-x) var(--sp-10); }
.content::-webkit-scrollbar { width: 6px; }
.content::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }

.section-title {
  font-size: 13px; font-weight: 600; color: var(--text-secondary);
  letter-spacing: 0.02em;
  margin: 28px 0 14px;
  display: flex; align-items: center; gap: 10px;
}
.section-title:first-child { margin-top: 8px; }
.section-title .count {
  font-size: 11px; font-weight: 500; padding: 2px 8px; border-radius: 8px;
  background: var(--border); color: var(--text-secondary);
}

/* ========== 网址卡片 ========== */
.sites-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
  gap: var(--sp-3);
}
.site-card {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px; background: var(--card-bg);
  border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  cursor: pointer; transition: all var(--transition);
  position: relative; overflow: hidden;
}
.site-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--accent-gradient); opacity: 0; transition: opacity var(--transition);
}
.site-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}
.site-card:hover::before { opacity: 1; }
.site-card:active { transform: translateY(-1px); }

.site-icon {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15);
}
.site-icon img { width: 28px; height: 28px; object-fit: contain; display: block; }
.site-icon .favicon-fallback { font-size: 18px; font-weight: 700; color: #fff; }

.site-info { flex: 1; min-width: 0; }
.site-name {
  font-size: 14px; font-weight: 600; margin-bottom: 3px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; letter-spacing: -0.01em;
}
.site-desc {
  font-size: 12px; color: var(--text-secondary); line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* ========== 空状态 ========== */
.empty-state { text-align: center; padding: 80px 20px; color: var(--text-secondary); }
.empty-state svg { width: 48px; height: 48px; margin-bottom: 16px; opacity: 0.4; }
.empty-state p { font-size: 15px; }
.empty-state .empty-hint { font-size: 13px; margin-top: 6px; opacity: 0.7; }

/* ========== 弹窗 ========== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; z-index: 1000;
  opacity: 0; visibility: hidden; transition: all var(--transition);
}
.modal-overlay.show { opacity: 1; visibility: visible; }
.modal {
  background: var(--card-bg); border-radius: 20px; padding: 28px;
  width: 90%; max-width: 440px; max-height: 90vh; overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0,0,0,0.2);
  transform: translateY(20px) scale(0.96); transition: transform var(--transition);
}
.modal-overlay.show .modal { transform: translateY(0) scale(1); }
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; letter-spacing: -0.01em; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-size: 13px; font-weight: 500;
  color: var(--text-secondary); margin-bottom: 6px;
}
.form-group input, .form-group select {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--bg); color: var(--text);
  font-size: 14px; outline: none; transition: all var(--transition);
}
.form-group input:focus, .form-group select:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light);
}
.form-group input::placeholder { color: var(--text-tertiary); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-check { display: flex; align-items: center; gap: 8px; }
.form-check input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); cursor: pointer; }
.form-check label { margin: 0; cursor: pointer; }

.modal-actions { display: flex; gap: 10px; margin-top: 24px; }
.btn-cancel, .btn-submit {
  flex: 1; padding: 11px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; transition: all var(--transition);
}
.btn-cancel { color: var(--text-secondary); background: var(--bg); border: 1px solid var(--border); }
.btn-cancel:hover { color: var(--text); background: var(--accent-light); }
.btn-submit { color: #fff; background: var(--accent-gradient); }
.btn-submit:hover { opacity: 0.9; }

/* ========== Toast ========== */
.toast {
  position: fixed; bottom: 32px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg);
  padding: 10px 20px; border-radius: 12px;
  font-size: 13px; opacity: 0; visibility: hidden;
  transition: all var(--transition); z-index: 2000;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.toast.show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }

/* ========== 移动端遮罩 ========== */
.sidebar-mask {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.3); z-index: 99;
  opacity: 0; visibility: hidden; transition: all var(--transition);
}
.sidebar-mask.show { opacity: 1; visibility: visible; }

/* ================================================================
   管理后台视图
   ================================================================ */
.admin-layout { flex: 1; display: flex; flex-direction: column; overflow: hidden; width: 100%; background: var(--bg-gradient); }
.admin-header {
  padding: 16px 32px; background: var(--sidebar-bg);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0; gap: 16px; flex-wrap: wrap;
}
.admin-header-left { display: flex; align-items: center; gap: 16px; }
.admin-header h1 { font-size: 18px; font-weight: 700; }
.admin-back {
  display: flex; align-items: center; gap: 6px; padding: 8px 14px;
  border-radius: var(--radius-sm); font-size: 13px; color: var(--text-secondary);
  transition: all var(--transition);
}
.admin-back:hover { background: var(--accent-light); color: var(--text); }
.admin-back svg { width: 15px; height: 15px; }

.admin-tabs { display: flex; gap: 4px; }
.admin-tab {
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 14px; color: var(--text-secondary); transition: all var(--transition);
}
.admin-tab:hover { background: var(--accent-light); color: var(--text); }
.admin-tab.active { background: var(--accent-light); color: var(--accent); font-weight: 600; }

.admin-body { flex: 1; overflow-y: auto; padding: 24px 32px; }
.admin-body::-webkit-scrollbar { width: 6px; }
.admin-body::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }

.login-wrap {
  flex: 1; display: flex; align-items: center; justify-content: center;
  background: var(--bg-gradient); width: 100%;
}
.login-box {
  background: var(--card-bg); border-radius: 20px; padding: 40px;
  width: 90%; max-width: 380px; box-shadow: var(--shadow);
}
.login-box .sidebar-logo { margin: 0 auto 16px; width: 48px; height: 48px; font-size: 22px; border-radius: 14px; }
.login-box h2 { text-align: center; font-size: 20px; margin-bottom: 24px; }
.login-hint { text-align: center; font-size: 12px; color: var(--text-secondary); margin-top: 16px; }

.admin-toolbar { display: flex; gap: 12px; margin-bottom: 20px; align-items: center; flex-wrap: wrap; }
.admin-toolbar .search-wrapper { max-width: 300px; position: relative; }
.admin-toolbar .search-wrapper svg {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; color: var(--text-tertiary); pointer-events: none;
}
.admin-toolbar .search-input {
  width: 100%; padding: 10px 16px 10px 40px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--card-bg); color: var(--text); font-size: 14px; outline: none;
}
.btn-primary {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: var(--radius-sm);
  background: var(--accent-gradient); color: #fff; font-size: 14px; font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,113,227,0.25);
  transition: all var(--transition);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,113,227,0.35); }
.btn-primary svg { width: 15px; height: 15px; }

.admin-table {
  width: 100%; background: var(--card-bg); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden;
}
.table-row {
  display: grid; grid-template-columns: 44px 48px 1.5fr 1.5fr 100px 140px;
  align-items: center; gap: 12px; padding: 12px 16px;
  border-bottom: 1px solid var(--border); font-size: 13px;
}
.table-row:last-child { border-bottom: none; }
.table-row.header {
  background: var(--accent-light); font-weight: 600;
  color: var(--text-secondary); font-size: 12px;
}
.table-row:not(.header):hover { background: var(--accent-light); }
.cell-url { color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cell-name { font-weight: 500; }

.mini-icon {
  width: 32px; height: 32px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 600; color: #fff; overflow: hidden;
}
.mini-icon img { width: 20px; height: 20px; object-fit: contain; }

.row-actions { display: flex; gap: 4px; justify-content: flex-end; }
.icon-btn {
  width: 30px; height: 30px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); transition: all var(--transition);
}
.icon-btn:hover { background: var(--accent-light); color: var(--text); }
.icon-btn.danger:hover { background: rgba(255,59,48,0.1); color: var(--danger); }
.icon-btn svg { width: 14px; height: 14px; }
.icon-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.icon-btn:disabled:hover { background: none; color: var(--text-secondary); }

.sort-btns { display: flex; flex-direction: column; gap: 2px; align-items: center; }
.sort-btns .icon-btn { width: 22px; height: 16px; }
.sort-btns .icon-btn svg { width: 10px; height: 10px; }

.cat-admin-list { display: flex; flex-direction: column; gap: 8px; max-width: 600px; }
.cat-admin-row {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; background: var(--card-bg);
  border-radius: var(--radius); border: 1px solid var(--border);
}
.cat-admin-row .cat-name { font-weight: 500; flex: 1; }
.cat-admin-row .cat-count { font-size: 12px; color: var(--text-secondary); }

/* ========== 响应式（移动优先，断点 640/768/1024/1280） ========== */
/* ≥1280px 桌面：侧边栏+5列（auto-fill 自动处理） */
/* 1024-1280：侧边栏仍在，卡片自动 4 列左右 */
@media (max-width: 1024px) {
  :root { --sidebar-w: 220px; }
}
/* 768-1024：平板，侧边栏仍在 */
@media (max-width: 768px) {
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; transform: translateX(-100%); box-shadow: 4px 0 24px rgba(0,0,0,0.1); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-mask { display: block; }
  .menu-toggle { display: flex; }
  .hero { flex-wrap: wrap; gap: var(--sp-2); padding-top: var(--sp-4); }
  .hero-left { min-width: 0; flex: 1; }
  .hero-search { order: 3; flex-basis: 100%; margin: 0; }
  .hero-right { order: 2; }
  .sites-grid { gap: var(--sp-2); }
  .site-card { padding: var(--sp-3); }
  .site-icon { width: 38px; height: 38px; }
  .site-icon img { width: 24px; height: 24px; }
  .admin-body { padding: var(--sp-4); }
  .admin-header { padding: var(--sp-3) var(--sp-4); }
  .table-row { grid-template-columns: 36px 40px 1fr 80px; }
  .table-row .cell-url, .table-row .cell-cat { display: none; }
}
/* ≤640px：手机单列卡片 */
@media (max-width: 640px) {
  .sites-grid { grid-template-columns: 1fr; }
  .admin-toolbar .search-wrapper { max-width: 100%; }
}