* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: -apple-system, 'Microsoft YaHei', sans-serif; background:#f0f2f5; color:#333; min-height:100vh; }
a { color:#07c; text-decoration:none; }
a:hover { text-decoration:underline; }

/* Layout */
.app-header { background:#1a1a2e; color:#fff; padding:0 24px; display:flex; align-items:center; height:56px; }
.app-header h1 { font-size:18px; font-weight:600; }
.app-header .nav { display:flex; gap:4px; margin-left:32px; }
.app-header .nav a { color:#aab; padding:8px 14px; border-radius:6px; font-size:14px; transition:all .2s; }
.app-header .nav a:hover { background:rgba(255,255,255,.1); text-decoration:none; color:#fff; }
.app-header .nav a.active { background:rgba(255,255,255,.15); color:#fff; }
.app-header .user-info { margin-left:auto; display:flex; align-items:center; gap:12px; font-size:13px; color:#aab; }
.app-header .user-info a { color:#aab; }
.app-main { max-width:1200px; margin:0 auto; padding:20px; }

/* Cards */
.card { background:#fff; border-radius:8px; box-shadow:0 1px 3px rgba(0,0,0,.08); padding:20px; margin-bottom:16px; }
.card h2 { font-size:16px; font-weight:600; margin-bottom:12px; }
.card h3 { font-size:14px; font-weight:600; margin-bottom:8px; }

/* Stats grid */
.stats-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(160px,1fr)); gap:12px; margin-bottom:20px; }
.stat-item { background:#fff; border-radius:8px; box-shadow:0 1px 3px rgba(0,0,0,.08); padding:16px; text-align:center; }
.stat-item .num { font-size:28px; font-weight:700; color:#1a1a2e; }
.stat-item .label { font-size:12px; color:#888; margin-top:4px; }

/* Tables */
table { width:100%; border-collapse:collapse; font-size:13px; }
th, td { padding:10px 12px; text-align:left; border-bottom:1px solid #eee; }
th { background:#f8f9fa; font-weight:600; color:#555; }
tr:hover { background:#f8f9fa; }

/* Forms */
.form-group { margin-bottom:14px; }
.form-group label { display:block; font-size:13px; font-weight:500; color:#555; margin-bottom:4px; }
.form-group input, .form-group select, .form-group textarea {
    width:100%; padding:8px 12px; border:1px solid #ddd; border-radius:6px; font-size:14px; outline:none; transition:border .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color:#07c; }
.form-group textarea { min-height:80px; resize:vertical; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:12px; }

/* Buttons */
.btn { display:inline-flex; align-items:center; gap:4px; padding:8px 16px; border:none; border-radius:6px; font-size:13px; font-weight:500; cursor:pointer; transition:all .2s; }
.btn-primary { background:#07c; color:#fff; }
.btn-primary:hover { background:#069; }
.btn-success { background:#28a745; color:#fff; }
.btn-success:hover { background:#218838; }
.btn-danger { background:#dc3545; color:#fff; }
.btn-danger:hover { background:#c82333; }
.btn-warning { background:#ffc107; color:#333; }
.btn-warning:hover { background:#e0a800; }
.btn-sm { padding:5px 10px; font-size:12px; }
.btn-outline { background:transparent; border:1px solid #ddd; color:#555; }
.btn-outline:hover { border-color:#07c; color:#07c; }

/* Messages */
.msg-card { padding:10px 14px; border-radius:6px; margin-bottom:8px; border:1px solid #eee; }
.msg-card:hover { border-color:#ccc; }
.msg-meta { font-size:11px; color:#999; display:flex; gap:8px; margin-bottom:2px; }
.msg-meta .tag { display:inline-block; padding:1px 6px; border-radius:3px; background:#e8f4fd; color:#07c; font-size:10px; }
.msg-meta .tag-img { background:#fce4ec; color:#c62828; }
.msg-meta .tag-voice { background:#f3e5f5; color:#7b1fa2; }
.msg-meta .tag-system { background:#e8f5e9; color:#2e7d32; }
.msg-content { font-size:14px; line-height:1.5; word-break:break-all; }

/* Pagination */
.pagination { display:flex; gap:6px; justify-content:center; margin-top:16px; }
.pagination a, .pagination span { padding:6px 12px; border-radius:4px; font-size:13px; }
.pagination a { background:#fff; border:1px solid #ddd; color:#333; }
.pagination a:hover { border-color:#07c; color:#07c; text-decoration:none; }
.pagination .current { background:#07c; color:#fff; }

/* Login page */
.login-page { display:flex; align-items:center; justify-content:center; min-height:100vh; background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%); }
.login-box { background:#fff; border-radius:12px; padding:40px; width:380px; box-shadow:0 10px 40px rgba(0,0,0,.2); }
.login-box h1 { text-align:center; font-size:20px; margin-bottom:24px; color:#1a1a2e; }
.login-box .error { background:#fce4ec; color:#c62828; padding:8px 12px; border-radius:6px; font-size:13px; margin-bottom:12px; text-align:center; }

/* Search bar */
.search-bar { display:flex; gap:8px; margin-bottom:16px; }
.search-bar input { flex:1; padding:10px 14px; border:1px solid #ddd; border-radius:6px; font-size:14px; }
.search-bar select { padding:10px 12px; border:1px solid #ddd; border-radius:6px; font-size:13px; background:#fff; }
.search-bar button { padding:10px 24px; }

/* Tabs */
.tabs { display:flex; gap:4px; margin-bottom:16px; border-bottom:2px solid #eee; padding-bottom:0; }
.tabs a { padding:8px 16px; font-size:13px; color:#666; border-bottom:2px solid transparent; margin-bottom:-2px; }
.tabs a:hover { color:#07c; text-decoration:none; }
.tabs a.active { color:#07c; border-bottom-color:#07c; font-weight:600; }

/* Badge */
.badge { display:inline-block; padding:2px 8px; border-radius:10px; font-size:11px; font-weight:500; }
.badge-success { background:#d4edda; color:#155724; }
.badge-danger { background:#f8d7da; color:#721c24; }
.badge-warning { background:#fff3cd; color:#856404; }

/* Modal overlay */
.modal-overlay { display:none; position:fixed; top:0; left:0; right:0; bottom:0; background:rgba(0,0,0,.4); z-index:1000; align-items:center; justify-content:center; }
.modal-overlay.active { display:flex; }
.modal-box { background:#fff; border-radius:12px; padding:24px; width:500px; max-width:90vw; max-height:80vh; overflow-y:auto; }
.modal-box h2 { margin-bottom:16px; }
.modal-actions { display:flex; gap:8px; justify-content:flex-end; margin-top:16px; }

/* Pre formatted JSON */
pre.json { background:#f5f5f5; padding:12px; border-radius:6px; font-size:12px; overflow-x:auto; max-height:300px; }

/* QR Code */
.qr-container { text-align:center; padding:20px; }
.qr-container img { width:280px; height:280px; }
.qr-container .hint { margin-top:12px; font-size:13px; color:#888; }

/* Responsive */
@media(max-width:768px) {
    .app-header { flex-wrap:wrap; height:auto; padding:8px 12px; }
    .app-header .nav { margin-left:0; flex-wrap:wrap; }
    .stats-grid { grid-template-columns:repeat(2,1fr); }
    .form-row { grid-template-columns:1fr; }
    .search-bar { flex-wrap:wrap; }
    .app-main { padding:12px; }
}

/* Toast */
.toast { position:fixed; top:20px; right:20px; background:#333; color:#fff; padding:12px 20px; border-radius:8px; font-size:14px; z-index:2000; opacity:0; transform:translateY(-10px); transition:all .3s; }
.toast.show { opacity:1; transform:translateY(0); }
.toast.success { background:#28a745; }
.toast.error { background:#dc3545; }

/* Checkbox toggle */
.toggle-wrap { display:flex; align-items:center; gap:8px; }
.toggle { position:relative; width:40px; height:22px; }
.toggle input { display:none; }
.toggle .slider { position:absolute; top:0; left:0; right:0; bottom:0; background:#ccc; border-radius:11px; cursor:pointer; transition:.3s; }
.toggle .slider::before { content:''; position:absolute; top:2px; left:2px; width:18px; height:18px; background:#fff; border-radius:50%; transition:.3s; }
.toggle input:checked+.slider { background:#07c; }
.toggle input:checked+.slider::before { transform:translateX(18px); }