:root {
  --bg:      #0f1117;
  --bg2:     #161b27;
  --bg3:     #1e2535;
  --bg4:     #252d42;
  --border:  #2a3348;
  --text:    #e2e8f0;
  --text2:   #94a3b8;
  --text3:   #64748b;
  --accent:  #3b82f6;
  --accent2: #2563eb;
  --green:   #22c55e;
  --red:     #ef4444;
  --orange:  #f97316;
  --yellow:  #eab308;
  --purple:  #a855f7;
  --teal:    #14b8a6;
  --radius:  8px;
  --shadow:  0 4px 24px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg4); border-radius: 3px; }

/* ── Login ── */
#login-screen { display:flex; align-items:center; justify-content:center; min-height:100vh; background:linear-gradient(135deg,#0f1117 0%,#1e2535 100%); }
.login-box { background:var(--bg2); border:1px solid var(--border); border-radius:16px; padding:48px 40px; width:420px; box-shadow:var(--shadow); }
.login-logo { text-align:center; margin-bottom:32px; }
.login-logo .icon { font-size:48px; }
.login-logo h1 { font-size:24px; font-weight:800; color:var(--accent); margin-top:8px; }
.login-logo p { color:var(--text2); font-size:13px; margin-top:4px; }
.login-tabs { display:flex; background:var(--bg3); border-radius:var(--radius); padding:4px; margin-bottom:24px; gap:4px; }
.login-tab { flex:1; padding:8px; text-align:center; border-radius:6px; color:var(--text2); font-size:13px; font-weight:600; cursor:pointer; border:none; background:none; transition:all .2s; }
.login-tab.active { background:var(--accent); color:#fff; }
.login-error { background:rgba(239,68,68,.12); border:1px solid rgba(239,68,68,.3); color:#fca5a5; padding:10px 14px; border-radius:var(--radius); font-size:13px; margin-bottom:16px; }

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

/* ── Sidebar ── */
.sidebar { width:240px; background:var(--bg2); border-right:1px solid var(--border); display:flex; flex-direction:column; flex-shrink:0; overflow-y:auto; }
.sidebar-logo { padding:20px 20px 16px; border-bottom:1px solid var(--border); }
.logo-text { font-size:18px; font-weight:800; color:var(--accent); }
.logo-sub { font-size:11px; color:var(--text3); margin-top:2px; }
.sidebar-section { padding:8px 0; }
.sidebar-section-title { padding:8px 20px 4px; font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:1px; color:var(--text3); }
.nav-item { display:flex; align-items:center; gap:10px; padding:9px 20px; color:var(--text2); cursor:pointer; font-size:13px; font-weight:500; border-left:3px solid transparent; transition:all .15s; text-decoration:none; }
.nav-item:hover { background:var(--bg3); color:var(--text); text-decoration:none; }
.nav-item.active { background:rgba(59,130,246,.12); color:var(--accent); border-left-color:var(--accent); }
.nav-icon { font-size:16px; width:18px; text-align:center; flex-shrink:0; }
.sidebar-footer { margin-top:auto; padding:16px 20px; border-top:1px solid var(--border); }
.user-info { display:flex; align-items:center; gap:10px; }
.user-avatar { width:34px; height:34px; border-radius:50%; background:var(--accent); display:flex; align-items:center; justify-content:center; font-weight:700; font-size:13px; flex-shrink:0; }
.user-name { font-size:13px; font-weight:600; }
.user-role { font-size:11px; color:var(--text3); }

/* ── Main ── */
.main-col { flex:1; display:flex; flex-direction:column; overflow:hidden; }
.topbar { display:flex; align-items:center; justify-content:space-between; padding:14px 32px; border-bottom:1px solid var(--border); background:var(--bg2); }
.topbar-bread { font-size:13px; color:var(--text2); }
.topbar-right { display:flex; align-items:center; gap:16px; }
.main-content { flex:1; overflow-y:auto; background:var(--bg); }
.page { padding:28px 32px; }

/* ── Page Header ── */
.page-header { display:flex; align-items:flex-start; justify-content:space-between; margin-bottom:24px; }
.page-title { font-size:22px; font-weight:700; }
.page-sub { color:var(--text2); font-size:13px; margin-top:3px; }

/* ── Buttons ── */
.btn { padding:10px 18px; border:none; border-radius:var(--radius); cursor:pointer; font-size:13px; font-weight:600; display:inline-flex; align-items:center; gap:6px; transition:all .2s; text-decoration:none; line-height:1; }
.btn:hover { text-decoration:none; opacity:.9; }
.btn-primary { background:var(--accent); color:#fff; }
.btn-primary:hover { background:var(--accent2); }
.btn-success { background:var(--green); color:#fff; }
.btn-danger { background:var(--red); color:#fff; }
.btn-ghost { background:var(--bg3); color:var(--text); border:1px solid var(--border); }
.btn-ghost:hover { background:var(--bg4); }
.btn-sm { padding:5px 10px; font-size:12px; }
.btn-full { width:100%; justify-content:center; }

/* ── Cards ── */
.card { background:var(--bg2); border:1px solid var(--border); border-radius:var(--radius); padding:20px; }
.card-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; }
.card-title { font-size:15px; font-weight:700; }

/* ── Stats ── */
.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:24px; }
.stat-card { background:var(--bg2); border:1px solid var(--border); border-radius:var(--radius); padding:20px; }
.stat-label { font-size:11px; color:var(--text2); font-weight:700; text-transform:uppercase; letter-spacing:.5px; margin-bottom:8px; display:flex; justify-content:space-between; }
.stat-value { font-size:30px; font-weight:800; line-height:1; }
.stat-sub { font-size:12px; color:var(--text3); margin-top:6px; }

/* ── Grids ── */
.grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }

/* ── Table ── */
.table-wrap { overflow-x:auto; }
table { width:100%; border-collapse:collapse; }
thead th { padding:10px 14px; text-align:left; font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.5px; color:var(--text3); border-bottom:1px solid var(--border); white-space:nowrap; }
tbody td { padding:11px 14px; border-bottom:1px solid var(--border); font-size:13px; }
tbody tr:last-child td { border-bottom:none; }
tbody tr:hover { background:var(--bg3); }
td .sub { font-size:11px; color:var(--text3); margin-top:2px; }

/* ── Badges ── */
.badge { display:inline-flex; align-items:center; padding:3px 9px; border-radius:20px; font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.3px; white-space:nowrap; }
.badge-green  { background:rgba(34,197,94,.15);  color:var(--green); }
.badge-red    { background:rgba(239,68,68,.15);   color:var(--red); }
.badge-orange { background:rgba(249,115,22,.15);  color:var(--orange); }
.badge-blue   { background:rgba(59,130,246,.15);  color:var(--accent); }
.badge-purple { background:rgba(168,85,247,.15);  color:var(--purple); }
.badge-teal   { background:rgba(20,184,166,.15);  color:var(--teal); }
.badge-yellow { background:rgba(234,179,8,.15);   color:var(--yellow); }

/* ── Node Cards ── */
.nodes-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:16px; }
.node-card { background:var(--bg2); border:1px solid var(--border); border-radius:var(--radius); padding:20px; }
.node-card.online  { border-left:3px solid var(--green); }
.node-card.offline { border-left:3px solid var(--red); }
.node-card.warning { border-left:3px solid var(--orange); }
.node-card-add { border:2px dashed var(--border); border-left:none; display:flex; align-items:center; justify-content:center; min-height:200px; cursor:pointer; color:var(--text3); text-decoration:none; }
.node-card-add:hover { background:var(--bg3); color:var(--text2); text-decoration:none; }
.node-header { display:flex; align-items:flex-start; justify-content:space-between; margin-bottom:14px; }
.node-name { font-size:15px; font-weight:700; }
.node-ip { font-size:11px; color:var(--text3); font-family:monospace; margin-top:2px; }
.node-type-badge { font-size:10px; font-weight:700; padding:3px 8px; border-radius:4px; text-transform:uppercase; letter-spacing:.5px; }
.node-type-web  { background:rgba(59,130,246,.2); color:var(--accent); }
.node-type-mail { background:rgba(168,85,247,.2); color:var(--purple); }

/* ── Resource Bars ── */
.resource-bars { display:flex; flex-direction:column; gap:10px; margin-bottom:14px; }
.res-label { display:flex; justify-content:space-between; margin-bottom:4px; font-size:12px; color:var(--text2); }
.res-val { font-weight:600; color:var(--text); }
.bar-track { height:6px; background:var(--bg4); border-radius:3px; overflow:hidden; }
.bar-fill { height:100%; border-radius:3px; }
.bar-low  { background:var(--green); }
.bar-mid  { background:var(--yellow); }
.bar-high { background:var(--red); }

/* ── Node Footer ── */
.node-services { display:flex; flex-wrap:wrap; gap:5px; margin-bottom:14px; }
.service-chip { font-size:11px; padding:3px 8px; background:var(--bg4); border-radius:4px; color:var(--text2); }
.node-footer { display:flex; justify-content:space-between; align-items:center; padding-top:14px; border-top:1px solid var(--border); }
.node-stat { text-align:center; }
.node-stat-val { font-size:16px; font-weight:700; }
.node-stat-lbl { font-size:10px; color:var(--text3); text-transform:uppercase; }

/* ── Package Cards ── */
.pkg-card { background:var(--bg2); border:1px solid var(--border); border-radius:var(--radius); padding:22px; }
.pkg-card-add { border:2px dashed var(--border); display:flex; align-items:center; justify-content:center; min-height:200px; cursor:pointer; border-radius:var(--radius); color:var(--text3); text-decoration:none; }
.pkg-card-add:hover { background:var(--bg3); color:var(--text2); text-decoration:none; }
.pkg-price { font-size:30px; font-weight:800; margin:12px 0 16px; }
.pkg-price span { font-size:14px; color:var(--text2); font-weight:400; }
.pkg-feature { display:flex; justify-content:space-between; padding:6px 0; font-size:13px; border-bottom:1px solid var(--border); }
.pkg-feature:last-child { border-bottom:none; }
.pkg-feature .lbl { color:var(--text2); }

/* ── Forms ── */
.form-group { margin-bottom:16px; }
.form-group label { display:block; color:var(--text2); font-size:11px; font-weight:700; margin-bottom:6px; text-transform:uppercase; letter-spacing:.5px; }
.form-group input,
.form-group select,
.form-group textarea { width:100%; padding:10px 14px; background:var(--bg3); border:1px solid var(--border); border-radius:var(--radius); color:var(--text); font-size:14px; transition:border-color .2s; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { outline:none; border-color:var(--accent); }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.form-hint { font-size:11px; color:var(--text3); margin-top:4px; }
.form-sep { border:none; border-top:1px solid var(--border); margin:16px 0; }

/* ── Search ── */
.search-wrap { position:relative; }
.search-wrap::before { content:'🔍'; position:absolute; left:12px; top:50%; transform:translateY(-50%); font-size:12px; pointer-events:none; }
.search-wrap input { padding-left:34px; }

/* ── Usage Bars (Customer) ── */
.usage-item { margin-bottom:12px; }
.usage-label { display:flex; justify-content:space-between; margin-bottom:4px; font-size:13px; }
.usage-label .lbl { color:var(--text2); }

/* ── Alert / Info Box ── */
.alert { padding:12px 16px; border-radius:var(--radius); margin-bottom:16px; font-size:13px; }
.alert-info    { background:rgba(59,130,246,.12); border:1px solid rgba(59,130,246,.3); color:#93c5fd; }
.alert-warning { background:rgba(249,115,22,.12); border:1px solid rgba(249,115,22,.3); color:#fdba74; }
.alert-mail    { background:rgba(168,85,247,.12); border:1px solid rgba(168,85,247,.3); color:#d8b4fe; }

/* ── Empty State ── */
.empty-state { text-align:center; padding:48px 20px; color:var(--text3); }
.empty-icon { font-size:48px; margin-bottom:12px; }

/* ── Activity Log ── */
.activity-item { display:flex; align-items:flex-start; gap:14px; padding:9px 0; border-bottom:1px solid var(--border); }
.activity-item:last-child { border-bottom:none; }
.activity-time { font-size:11px; color:var(--text3); white-space:nowrap; min-width:90px; padding-top:2px; }

/* ── Dashboard info card ── */
.info-row { display:flex; align-items:center; gap:12px; padding:12px; background:var(--bg3); border-radius:var(--radius); margin-bottom:10px; }
.info-row .info-icon { font-size:24px; flex-shrink:0; }
.info-row .info-body { flex:1; }
.info-row .info-title { font-weight:700; font-size:14px; }
.info-row .info-sub { font-size:11px; color:var(--text3); margin-top:2px; }

/* ── Monospace ── */
.mono { font-family: 'Consolas', 'Monaco', monospace; }

/* ── SSL badge ── */
.ssl-le     { color:var(--green); }
.ssl-manual { color:var(--yellow); }
.ssl-none   { color:var(--red); }

@media (max-width:900px) {
  .stats-grid { grid-template-columns:1fr 1fr; }
  .grid-2 { grid-template-columns:1fr; }
  .grid-3 { grid-template-columns:1fr 1fr; }
}