/* ============================================================
   CSS Variables & Theme System
   ============================================================ */

:root {
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8f9ff;
  --bg-input: #ffffff;
  --bg-engine-btn: #f0f2f5;
  --bg-engine-btn-hover: #e4e6eb;
  --bg-engine-btn-active: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #555770;
  --text-muted: #999;
  --text-placeholder: #aaa;
  --border-color: #e8e8ef;
  --border-card: #eeeef4;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-input: 0 2px 12px rgba(0,0,0,0.10);
  --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.14);
  --accent: #4f6ef7;
  --accent-light: #eef1ff;
  --accent-dark: #3b54d4;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 50px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.35s ease;
}

[data-theme="dark"] {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #1e1e35;
  --bg-card-hover: #252540;
  --bg-input: #1e1e35;
  --bg-engine-btn: #1e1e35;
  --bg-engine-btn-hover: #2a2a42;
  --bg-engine-btn-active: #2a2a42;
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6a6a80;
  --text-placeholder: #5a5a70;
  --border-color: #2a2a42;
  --border-card: #2a2a42;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.35);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-input: 0 2px 12px rgba(0,0,0,0.4);
  --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.5);
  --accent: #6c83ff;
  --accent-light: #1a1f3a;
  --accent-dark: #8a9dff;
}

/* ============================================================
   Reset & Base
   ============================================================ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg-primary); color: var(--text-primary);
  min-height: 100vh;
  transition: background var(--transition-normal), color var(--transition-normal);
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; }
input { font-family: inherit; font-size: inherit; }

/* ============================================================
   Top Bar
   ============================================================ */

.top-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px; max-width: 1400px; margin: 0 auto;
}
.logo-text { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); opacity: 0.85; }
.top-bar-right { display: flex; align-items: center; gap: 12px; }
.clock {
  font-size: 0.95rem; font-weight: 500; color: var(--text-secondary);
  font-variant-numeric: tabular-nums; letter-spacing: 0.5px; min-width: 50px;
}
.theme-toggle, .admin-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%; color: var(--text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.theme-toggle:hover, .admin-toggle:hover { background: var(--bg-engine-btn); color: var(--text-primary); }
.theme-toggle:hover { transform: rotate(15deg); }
.admin-toggle:hover { transform: rotate(60deg); }
.theme-toggle:active, .admin-toggle:active { transform: scale(0.9) rotate(15deg); }
.admin-toggle:active { transform: scale(0.9) rotate(60deg); }
.icon-sun { display: block; } .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ============================================================
   Hero Search
   ============================================================ */

.hero {
  display: flex; flex-direction: column; align-items: center;
  padding: 48px 24px 32px; max-width: 800px; margin: 0 auto;
}
.hero-title { font-size: 2rem; font-weight: 700; color: var(--text-primary); margin-bottom: 28px; letter-spacing: -0.5px; }
.search-container { width: 100%; max-width: 620px; }
.search-box { position: relative; display: flex; align-items: center; width: 100%; }
.search-icon {
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); pointer-events: none; transition: color var(--transition-fast);
}
.search-input {
  width: 100%; height: 52px; padding: 0 48px 0 48px;
  border: 2px solid transparent; border-radius: var(--radius-xl);
  background: var(--bg-input); color: var(--text-primary); font-size: 1rem;
  box-shadow: var(--shadow-input); transition: all var(--transition-normal); outline: none;
}
.search-input::placeholder { color: var(--text-placeholder); }
.search-input:focus { border-color: var(--accent); box-shadow: var(--shadow-input), 0 0 0 4px var(--accent-light); }
.search-box:focus-within .search-icon { color: var(--accent); }
.search-clear {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--text-muted); opacity: 0; pointer-events: none; transition: all var(--transition-fast);
}
.search-clear.visible { opacity: 1; pointer-events: auto; }
.search-clear:hover { background: var(--bg-engine-btn); color: var(--text-primary); }
.engine-selector { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; justify-content: center; }
.engine-btn {
  display: flex; align-items: center; gap: 6px; padding: 8px 16px;
  border-radius: var(--radius-full); background: var(--bg-engine-btn);
  color: var(--text-secondary); font-size: 0.875rem; font-weight: 500;
  transition: all var(--transition-fast); border: 2px solid transparent;
}
.engine-btn:hover { background: var(--bg-engine-btn-hover); color: var(--text-primary); }
.engine-btn.active {
  background: var(--bg-engine-btn-active); color: var(--accent);
  border-color: var(--accent); box-shadow: var(--shadow-sm); font-weight: 600;
}
.engine-btn svg { flex-shrink: 0; }

/* ============================================================
   Navigation Content
   ============================================================ */

/* Page Layout */
.page-layout { display: flex; max-width: 1400px; margin: 0 auto; gap: 0; align-items: flex-start; }
.content { flex: 1; min-width: 0; padding: 0 24px 48px; }

/* Sidebar */
.sidebar { width: 180px; flex-shrink: 0; position: sticky; top: 0; max-height: 100vh; overflow-y: auto; padding: 12px 8px; border-right: 1px solid var(--border-color); background: var(--bg-primary); z-index: 10; transition: transform var(--transition-normal); }
.sidebar-nav { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.sidebar-item { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-radius: var(--radius-sm); cursor: pointer; font-size: 0.85rem; color: var(--text-secondary); transition: all var(--transition-fast); user-select: none; -webkit-tap-highlight-color: transparent; }
.sidebar-item:hover { background: var(--bg-card); color: var(--text-primary); }
.sidebar-item.active { background: var(--accent-light); color: var(--accent); font-weight: 600; }
.sidebar-icon { font-size: 1.1rem; flex-shrink: 0; width: 24px; text-align: center; }
.sidebar-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Sidebar toggle (mobile) */
.sidebar-toggle { display: none; position: fixed; bottom: 20px; left: 16px; z-index: 50; width: 44px; height: 44px; border-radius: 50%; background: var(--accent); color: #fff; box-shadow: var(--shadow-lg); align-items: center; justify-content: center; cursor: pointer; transition: transform var(--transition-fast), box-shadow var(--transition-fast); }
.sidebar-toggle:hover { transform: scale(1.1); box-shadow: 0 6px 20px rgba(0,0,0,0.2); }
.sidebar-toggle:active { transform: scale(0.95); }

/* Sidebar mobile */
@media (max-width: 900px) {
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 100; transform: translateX(-100%); box-shadow: var(--shadow-lg); background: var(--bg-secondary); width: 220px; padding-top: 16px; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-toggle { display: flex; }
  .content { padding: 0 16px 48px; }
}
.category-section { margin-bottom: 36px; }
.category-header { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; padding-left: 4px; }
.category-icon { font-size: 1.4rem; }
.category-name { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); }
.card-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.site-card {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-md); box-shadow: var(--shadow-sm); cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  user-select: none; -webkit-tap-highlight-color: transparent;
}
.site-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card-hover); background: var(--bg-card-hover); border-color: var(--accent); }
.site-card:active { transform: translateY(-1px); }
.site-card-icon {
  font-size: 1.6rem; flex-shrink: 0; width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-light); border-radius: var(--radius-sm);
}
.site-card-icon img { width: 22px; height: 22px; object-fit: contain; display: block; }
.site-card-info { min-width: 0; }
.site-card-name { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.site-card-desc { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.empty-hint { grid-column: 1 / -1; text-align: center; color: var(--text-muted); font-size: 0.85rem; padding: 16px 0; }

/* Sub-section (二级分类) */
.sub-section { margin-bottom: 20px; }
.sub-header { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; padding-left: 8px; }
.sub-icon { font-size: 1.1rem; }
.sub-name { font-size: 1rem; font-weight: 600; color: var(--text-secondary); }

/* Sidebar sub-item */
.sidebar-sub { padding-left: 36px; font-size: 0.8rem; opacity: 0.85; }
.sidebar-sub .sidebar-icon { font-size: 0.95rem; }

/* Admin sub-item */
.admin-sub-item { padding-left: 28px; background: var(--bg-card); }
.admin-sub-item .admin-item-name { font-size: 0.84rem; color: var(--text-secondary); }

/* ============================================================
   Footer
   ============================================================ */

.footer { text-align: center; padding: 24px; color: var(--text-muted); font-size: 0.8rem; }

/* ============================================================
   Scrollbar
   ============================================================ */

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  height: 42px; padding: 0 20px; border-radius: var(--radius-sm); font-size: 0.9rem;
  font-weight: 600; transition: all var(--transition-fast); border: none; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary:active { transform: translateY(0); }
.btn-sm { height: 32px; padding: 0 12px; font-size: 0.8rem; }
.btn-lock { background: var(--bg-engine-btn); color: var(--text-secondary); flex-shrink: 0; }
.btn-lock:hover { background: #fde8e8; color: #d93025; }
[data-theme="dark"] .btn-lock:hover { background: #3a1a1a; color: #f28b82; }

/* ============================================================
   Auth Overlay & Dialog
   ============================================================ */

.auth-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  z-index: 1100; display: flex; align-items: center; justify-content: center; padding: 24px;
}
.auth-overlay[hidden] { display: none; }
.auth-dialog {
  width: 100%; max-width: 380px; background: var(--bg-secondary);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  padding: 28px 24px 20px; display: flex; flex-direction: column; gap: 16px;
}
.auth-title { text-align: center; font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin: 0; }
.auth-state { display: flex; flex-direction: column; gap: 10px; }
.auth-hint { font-size: 0.85rem; color: var(--text-secondary); text-align: center; margin: 0; }
.auth-input {
  height: 44px; padding: 0 14px; border: 2px solid var(--border-color);
  border-radius: var(--radius-sm); background: var(--bg-input); color: var(--text-primary);
  font-size: 0.95rem; transition: border-color var(--transition-fast), box-shadow var(--transition-fast); outline: none;
}
.auth-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }
.auth-input::placeholder { color: var(--text-placeholder); }
.auth-btn { width: 100%; height: 44px; font-size: 0.95rem; }
.auth-error { text-align: center; color: #d93025; font-size: 0.85rem; margin: 0; padding: 6px 12px; background: #fde8e8; border-radius: var(--radius-sm); }
[data-theme="dark"] .auth-error { background: #3a1a1a; color: #f28b82; }
.auth-error[hidden] { display: none; }
.auth-cancel { text-align: center; color: var(--text-muted); font-size: 0.85rem; cursor: pointer; padding: 6px; border-radius: var(--radius-sm); transition: all var(--transition-fast); }
.auth-cancel:hover { color: var(--text-secondary); background: var(--bg-engine-btn); }
@keyframes authShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ============================================================
   Admin Overlay & Panel
   ============================================================ */

.admin-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.45);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  z-index: 1000; display: flex; align-items: center; justify-content: center; padding: 24px;
}
.admin-overlay[hidden] { display: none; }
.admin-panel {
  width: 100%; max-width: 760px; max-height: 85vh; background: var(--bg-secondary);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); display: flex; flex-direction: column; overflow: hidden;
}
.admin-header {
  display: flex; align-items: center; gap: 10px; padding: 14px 18px;
  border-bottom: 1px solid var(--border-color); flex-shrink: 0;
}
.admin-title { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); white-space: nowrap; }
.admin-tabs { display: flex; gap: 4px; background: var(--bg-engine-btn); border-radius: var(--radius-sm); padding: 3px; }
.admin-tab {
  padding: 5px 10px; border-radius: 6px; font-size: 0.82rem; font-weight: 500;
  color: var(--text-secondary); transition: all var(--transition-fast); white-space: nowrap;
}
.admin-tab:hover { color: var(--text-primary); }
.admin-tab.active { background: var(--bg-secondary); color: var(--accent); font-weight: 600; box-shadow: var(--shadow-sm); }
.admin-close {
  margin-left: auto; width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 1.5rem;
  color: var(--text-muted); transition: all var(--transition-fast); flex-shrink: 0;
}
.admin-close:hover { background: var(--bg-engine-btn); color: var(--text-primary); }
.admin-body { flex: 1; overflow-y: auto; padding: 20px; }
.admin-tab-content { display: none; }
.admin-tab-content.active { display: block; }

/* Admin Form */
.admin-form {
  display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px;
  padding-bottom: 20px; border-bottom: 1px solid var(--border-color);
}
.admin-form input, .admin-form select {
  height: 42px; padding: 0 14px; border: 2px solid var(--border-color);
  border-radius: var(--radius-sm); background: var(--bg-input); color: var(--text-primary);
  font-size: 0.9rem; transition: border-color var(--transition-fast), box-shadow var(--transition-fast); outline: none;
}
.admin-form input:focus, .admin-form select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }
.admin-form input::placeholder { color: var(--text-placeholder); }
.admin-form select { cursor: pointer; }
.favicon-preview { display: flex; align-items: center; gap: 8px; padding: 6px 12px; background: var(--bg-card); border-radius: var(--radius-sm); font-size: 0.8rem; color: var(--text-secondary); }
.favicon-preview[hidden] { display: none; }
.favicon-preview img { width: 20px; height: 20px; object-fit: contain; }

/* Appearance tab */
.form-label { font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); margin-bottom: -6px; }
.color-picker-row { display: flex; gap: 8px; align-items: center; }
.color-picker-row input[type="color"] { width: 44px; height: 42px; padding: 2px; cursor: pointer; flex-shrink: 0; }
.color-picker-row input[type="text"] { flex: 1; }
.form-actions { display: flex; gap: 8px; align-items: center; margin-top: 4px; }
.btn-sm { height: 32px; padding: 0 14px; border-radius: var(--radius-sm); font-size: 0.82rem; font-weight: 500; cursor: pointer; border: none; background: var(--bg-engine-btn); color: var(--text-secondary); transition: all var(--transition-fast); display: inline-flex; align-items: center; justify-content: center; }
.btn-sm:hover { background: var(--bg-engine-btn-hover); color: var(--text-primary); }
.bg-preview { display: flex; align-items: center; gap: 8px; padding: 6px 12px; background: var(--bg-card); border-radius: var(--radius-sm); font-size: 0.8rem; color: var(--text-secondary); }
.bg-preview[hidden] { display: none; }

/* Backup tab */
.backup-info { padding: 12px; background: var(--bg-card); border-radius: var(--radius-sm); font-size: 0.85rem; color: var(--text-secondary); line-height: 1.8; }
.backup-info span { font-weight: 600; color: var(--text-primary); }
.backup-actions { margin-top: 4px; }
.backup-file-label { cursor: pointer; position: relative; }
.backup-file-label input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.btn-danger { background: #ea4335; color: #fff; }
.btn-danger:hover { background: #d33426; }
.backup-hint { font-size: 0.82rem; text-align: center; margin: 0; padding: 8px 12px; border-radius: var(--radius-sm); }
.backup-hint.success { color: #1a7d36; background: #e8f5e9; }
.backup-hint.error { color: #d93025; background: #fde8e8; }
.backup-hint[hidden] { display: none; }
[data-theme="dark"] .backup-hint.success { background: #1a3a1e; color: #81c784; }
[data-theme="dark"] .backup-hint.error { background: #3a1a1a; color: #f28b82; }

/* R2 sync */
.form-hint { font-size: 0.82rem; color: var(--text-muted); margin: -4px 0 4px; line-height: 1.5; }
.r2-status { margin-top: 4px; padding: 10px 12px; border-radius: var(--radius-sm); font-size: 0.83rem; }
.r2-status.success { background: #e8f5e9; color: #1a7d36; }
.r2-status.error { background: #fde8e8; color: #d93025; }
.r2-status[hidden] { display: none; }
[data-theme="dark"] .r2-status.success { background: #1a3a1e; color: #81c784; }
[data-theme="dark"] .r2-status.error { background: #3a1a1a; color: #f28b82; }

/* Custom background on body */
body.has-bg-image { background-size: cover; background-position: center; background-attachment: fixed; }
body.has-bg-image::before { content: ''; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: -1; }
[data-theme="dark"] body.has-bg-image::before { background: rgba(0,0,0,0.6); }

/* Admin List */
.admin-list { list-style: none; display: flex; flex-direction: column; }
.admin-list-item {
  display: flex; align-items: center; gap: 10px; padding: 12px 10px;
  border-bottom: 1px solid var(--border-color); transition: background var(--transition-fast);
}
.admin-list-item:hover { background: var(--bg-card-hover); }
.admin-empty { justify-content: center; color: var(--text-muted); font-size: 0.85rem; padding: 24px; }
.admin-item-icon { font-size: 1.3rem; flex-shrink: 0; width: 36px; text-align: center; }
.site-icon-small { font-size: 1rem; width: 28px; }
.site-icon-small img { width: 18px; height: 18px; object-fit: contain; display: block; }
.admin-item-name { font-weight: 600; color: var(--text-primary); font-size: 0.9rem; min-width: 60px; }
.admin-item-count { font-size: 0.8rem; color: var(--text-muted); margin-left: 4px; }
.admin-item-url { font-size: 0.78rem; color: var(--text-muted); margin-left: auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 200px; }
.admin-item-actions { display: flex; gap: 2px; margin-left: auto; flex-shrink: 0; }
.admin-action-btn {
  width: 32px; height: 32px; border-radius: 6px; display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; cursor: pointer; transition: all var(--transition-fast); opacity: 0.6;
}
.admin-action-btn:hover { opacity: 1; background: var(--bg-engine-btn); }
.admin-action-btn:disabled { opacity: 0.2; cursor: default; }
.admin-action-btn:disabled:hover { background: none; }
.admin-action-danger:hover { background: #fde8e8; }
[data-theme="dark"] .admin-action-danger:hover { background: #3a1a1a; }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1400px) { .card-grid { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 1100px) { .card-grid { grid-template-columns: repeat(4, 1fr); } }

@media (max-width: 768px) {
  .hero { padding: 32px 16px 24px; }
  .hero-title { font-size: 1.6rem; margin-bottom: 20px; }
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .content { padding: 0 16px 32px; }
  .engine-btn { padding: 6px 14px; font-size: 0.8rem; }
  .engine-btn span { display: none; }
  .engine-btn { gap: 4px; }
}

@media (max-width: 550px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .site-card { padding: 12px; gap: 8px; }
  .site-card-icon { width: 32px; height: 32px; font-size: 1.2rem; }
  .site-card-name { font-size: 0.8rem; }
  .site-card-desc { display: none; }
  .hero { padding: 24px 16px 20px; }
  .hero-title { font-size: 1.4rem; }
  .top-bar { padding: 10px 16px; }

  .admin-overlay { padding: 0; align-items: stretch; }
  .admin-panel { max-width: 100%; max-height: 100vh; border-radius: 0; }
  .admin-header { flex-wrap: wrap; gap: 10px; padding: 12px 16px; }
  .admin-title { font-size: 1rem; }
  .btn-lock { font-size: 0; padding: 0 8px; gap: 0; }
  .btn-lock::before { content: '🔒'; font-size: 0.9rem; }
  .admin-tabs { order: 3; width: 100%; }
  .admin-tab { flex: 1; text-align: center; }
  .admin-body { padding: 16px; }
  .admin-item-url { display: none; }
  .admin-form input, .admin-form select { height: 38px; font-size: 0.85rem; }
  .auth-dialog { margin: 16px; padding: 20px 16px 16px; }
}

@media (max-width: 400px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .site-card { padding: 10px; }
  .search-input { height: 44px; font-size: 0.9rem; padding: 0 40px 0 42px; }
}