:root {
  --bg: #0F1117;
  --card: #1A1D27;
  --border: #2A2D37;
  --accent: #FF6B35;
  --accent-hover: #e55a2b;
  --text: #E4E6EB;
  --text-muted: #8B8F9A;
  --success: #00C853;
  --danger: #FF5252;
  --warning: #FFB300;
  --telegram: #0088CC;
  --whatsapp: #25D366;
  --aliexpress: #FF6B35;
  --shopee: #EE4D2D;
  --radius: 12px;
  --sidebar-w: 220px;
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg); color: var(--text); min-height: 100vh;
  display: flex; line-height: 1.5;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w); background: var(--card);
  border-right: 1px solid var(--border); padding: 24px 0;
  display: flex; flex-direction: column;
  position: fixed; top:0; left:0; bottom:0; z-index:100;
}
.sidebar .logo { font-size:20px; font-weight:800; padding:0 24px 32px; color:var(--accent); }
.sidebar .logo span { color: var(--accent); }
.sidebar nav a {
  display:flex; align-items:center; gap:10px;
  padding:11px 24px; color:var(--text-muted);
  text-decoration:none; font-size:13px;
  border-left:3px solid transparent; transition:all 0.15s;
}
.sidebar nav a:hover { background:#22252F; color:var(--text); }
.sidebar nav a.active { color:var(--accent); background:#1F222C; border-left-color:var(--accent); }
.sidebar .user-footer {
  margin-top:auto; padding:20px 24px;
  border-top:1px solid var(--border);
  display:flex; align-items:center; gap:10px; font-size:13px;
}
.user-footer .logout-btn { color:var(--text-muted); cursor:pointer; font-size:12px; margin-left:auto; }
.user-footer .logout-btn:hover { color:var(--danger); }
.avatar {
  width:30px; height:30px; border-radius:8px; background:var(--accent);
  display:flex; align-items:center; justify-content:center;
  font-weight:700; font-size:13px;
}
.badge-pro { background:var(--accent); color:#fff; font-size:10px; padding:2px 8px; border-radius:10px; margin-left:auto; }

/* Main */
.main { margin-left:var(--sidebar-w); flex:1; padding:30px; overflow-y:auto; }
.topbar { display:flex; justify-content:space-between; align-items:center; margin-bottom:28px; }
.topbar h1 { font-size:22px; font-weight:700; }
.topbar .updated { font-size:12px; color:var(--text-muted); }

/* Cards */
.card {
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius); padding:22px;
}
.metrics { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-bottom:24px; }
.metric-card .label { font-size:12px; color:var(--text-muted); margin-bottom:6px; display:flex; align-items:center; gap:6px; }
.metric-card .value { font-size:32px; font-weight:700; }
.metric-card .trend { font-size:11px; margin-top:4px; }
.trend-up { color:var(--success); }
.trend-down { color:var(--danger); }

/* Grid */
.panels { display:grid; grid-template-columns:1fr 1fr; gap:18px; margin-bottom:24px; }
.chart-wrap { position:relative; height:250px; display:flex; align-items:center; justify-content:center; }
.chart-wrap canvas { max-height:100%; }
.section-title { font-size:14px; font-weight:600; margin-bottom:14px; color:var(--text); }

/* Table */
table { width:100%; border-collapse:collapse; font-size:12px; }
th { text-align:left; color:var(--text-muted); padding:10px 12px; font-weight:500; border-bottom:1px solid var(--border); }
td { padding:10px 12px; border-bottom:1px solid #1F2230; }
tr:hover td { background:#1A1D30; }
.rank { font-weight:700; }
.rank.gold { color:#FFD700; }
.rank.silver { color:#C0C0C0; }
.rank.bronze { color:#CD7F32; }
.discount-pct { font-weight:600; color:var(--success); }
.link-icon { color:var(--accent); text-decoration:none; font-size:14px; }

/* Badges */
.badge { padding:3px 8px; border-radius:6px; font-size:10px; font-weight:600; }
.badge-ae { background:rgba(255,107,53,0.15); color:var(--aliexpress); }
.badge-sp { background:rgba(238,77,45,0.15); color:var(--shopee); }

/* Feed */
.feed { max-height:200px; overflow-y:auto; }
.feed-item { display:flex; justify-content:space-between; align-items:center; padding:9px 0; border-bottom:1px solid #1F2230; font-size:12px; }
.feed-item .time { color:var(--text-muted); min-width:40px; }
.feed-item .item-name { flex:1; margin:0 10px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }

/* Channels mini */
.channels-mini { display:flex; flex-direction:column; gap:10px; }
.channel-row { display:flex; align-items:center; gap:10px; padding:10px; background:#1F2230; border-radius:8px; font-size:12px; }
.channel-row .ch-icon { font-size:18px; }
.channel-row .ch-info { flex:1; }
.channel-row .ch-name { font-weight:600; }
.channel-row .ch-id { font-size:10px; color:var(--text-muted); }
.ch-status { width:8px; height:8px; border-radius:50%; }
.ch-status.on { background:var(--success); }
.ch-status.off { background:var(--text-muted); }

/* Buttons */
.btn {
  background:var(--accent); color:#fff; border:none;
  padding:10px 22px; border-radius:8px; cursor:pointer;
  font-size:13px; font-weight:600; transition:background 0.15s;
  display:inline-flex; align-items:center; gap:6px;
}
.btn:hover { background:var(--accent-hover); }
.btn:disabled { opacity:0.6; cursor:not-allowed; }
.btn-full { width:100%; justify-content:center; }
.btn-outline { background:transparent; border:1px solid var(--border); color:var(--text); }
.btn-outline:hover { background:#22252F; }
.btn-sm { padding:6px 14px; font-size:11px; }

/* Forms */
.form-group { margin-bottom:16px; }
.form-group label { display:block; font-size:12px; color:var(--text-muted); margin-bottom:5px; font-weight:500; }
input, select, textarea {
  background:var(--bg); color:var(--text); border:1px solid var(--border);
  padding:10px 14px; border-radius:8px; font-size:13px; width:100%;
  font-family:inherit; transition:border-color 0.15s;
}
input:focus, select:focus, textarea:focus { outline:none; border-color:var(--accent); }
select { cursor:pointer; appearance:none; background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238B8F9A' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E"); background-repeat:no-repeat; background-position:right 14px center; padding-right:36px; }
textarea { resize:vertical; min-height:80px; }

/* Preview */
.img-preview { width:200px; border-radius:8px; margin-top:10px; border:1px solid var(--border); display:none; }
.img-preview.show { display:block; }

/* Spinner */
.spinner { display:none; width:18px; height:18px; border:2px solid rgba(255,255,255,0.3); border-top-color:#fff; border-radius:50%; animation:spin 0.6s linear infinite; }
.spinner.show { display:inline-block; }
@keyframes spin { to { transform:rotate(360deg); } }

/* Toast */
.toast-container { position:fixed; top:20px; right:20px; z-index:9999; display:flex; flex-direction:column; gap:10px; }
.toast { padding:14px 20px; border-radius:10px; font-size:13px; font-weight:500; animation:slideIn 0.3s ease; max-width:380px; }
.toast-success { background:#1B3A2D; color:var(--success); border:1px solid var(--success); }
.toast-error { background:#3A1B1B; color:var(--danger); border:1px solid var(--danger); }
.toast-warning { background:#3A301B; color:var(--warning); border:1px solid var(--warning); }
@keyframes slideIn { from { transform:translateX(100%); opacity:0; } to { transform:translateX(0); opacity:1; } }

/* Skeleton */
.skeleton { background:linear-gradient(90deg,var(--card) 25%,#252935 50%,var(--card) 75%); background-size:200% 100%; animation:shimmer 1.5s infinite; border-radius:6px; }
@keyframes shimmer { 0% { background-position:200% 0; } 100% { background-position:-200% 0; } }

/* Toggle Switch */
.toggle { position:relative; display:inline-block; width:44px; height:24px; }
.toggle input { opacity:0; width:0; height:0; }
.toggle .slider { position:absolute; cursor:pointer; inset:0; background:var(--border); border-radius:24px; transition:0.2s; }
.toggle .slider:before { content:""; position:absolute; height:18px; width:18px; left:3px; bottom:3px; background:#fff; border-radius:50%; transition:0.2s; }
.toggle input:checked + .slider { background:var(--success); }
.toggle input:checked + .slider:before { transform:translateX(20px); }

/* Expand form */
.expand-form { display:none; margin-top:12px; }
.expand-form.open { display:block; }
.error-msg { color:var(--danger); font-size:11px; margin-top:4px; display:none; }
.error-msg.show { display:block; }

/* Login page (no sidebar) */
.login-body { display:flex; align-items:center; justify-content:center; min-height:100vh; background:var(--bg); }
.login-card { background:var(--card); border:1px solid var(--border); border-radius:16px; padding:40px; width:100%; max-width:400px; }
.login-card .logo { font-size:28px; font-weight:800; text-align:center; margin-bottom:30px; }
.login-card .logo span { color:var(--accent); }

/* Empty state */
.empty-state { text-align:center; padding:40px 20px; color:var(--text-muted); font-size:13px; }
.empty-state .icon { font-size:40px; margin-bottom:10px; opacity:0.5; }

/* Range slider */
input[type=range] { -webkit-appearance:none; height:6px; background:var(--border); border-radius:3px; padding:0; border:none; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance:none; width:18px; height:18px; background:var(--accent); border-radius:50%; cursor:pointer; }
.range-row { display:flex; gap:12px; align-items:center; }
.range-row input[type=number] { width:70px; }

/* Mobile */
@media (max-width:768px) {
  .sidebar { width:100%; height:56px; flex-direction:row; padding:0; bottom:auto; top:0; }
  .sidebar .logo { padding:0 16px; font-size:16px; line-height:56px; }
  .sidebar nav { display:flex; flex:1; overflow-x:auto; }
  .sidebar nav a { padding:0 12px; line-height:56px; border-left:none; border-bottom:3px solid transparent; font-size:11px; white-space:nowrap; }
  .sidebar nav a.active { border-left:none; border-bottom-color:var(--accent); }
  .sidebar .user-footer { display:none; }
  .main { margin-left:0; margin-top:56px; padding:16px; }
  .metrics { grid-template-columns:1fr; }
  .panels { grid-template-columns:1fr; }
  .login-card { margin:20px; }
}