:root {
  --bg: #f5f0e8;
  --surface: #faf8f4;
  --surface-strong: #fff;
  --ink: #1a1e2b;
  --muted: #5f6b7a;
  --accent: #0f766e;
  --accent-soft: #d7f3ef;
  --accent-dark: #0d5f58;
  --line: #e4ddd2;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --success: #16a34a;
  --danger: #dc2626;
  --warn: #d97706;
  --sidebar-w: 240px;
  --topbar-h: 60px;
}

* { box-sizing:border-box; margin:0; padding:0; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
}

.login-overlay {
  position:fixed; inset:0; z-index:1000;
  background:linear-gradient(135deg, #0f766e 0%, #14b8a6 50%, #0d9488 100%);
  display:flex; align-items:center; justify-content:center;
}
.login-card {
  background: var(--surface-strong);
  border-radius: 20px; padding: 2.5rem;
  width: 380px; max-width: 90%;
  text-align: center;
  box-shadow: 0 24px 60px rgba(0,0,0,0.15);
}
.login-card .brand-logo { width:180px; margin-bottom:1rem; }
.login-card h2 { margin-bottom:0.5rem; font-size:1.5rem; }
.login-hint { color:var(--muted); font-size:0.85rem; margin-bottom:1rem; }
.login-card input {
  width:100%; padding:0.7rem; border:1px solid var(--line); border-radius:8px;
  font-size:0.9rem; margin-bottom:1rem; text-align:center;
}
.login-card input:focus { outline:none; border-color:var(--accent); }
#login-error { margin-top:0.75rem; display:none; }

#app { display:flex; min-height:100vh; }

.sidebar {
  width:var(--sidebar-w);
  background:var(--ink);
  color:#fff;
  display:flex; flex-direction:column;
  position:fixed; top:0; left:0; bottom:0;
  z-index:100; overflow-y:auto;
}
.sidebar-brand {
  padding:1.25rem 1.25rem 0.75rem;
  display:flex; align-items:center; gap:0.5rem;
  font-weight:700; font-size:0.95rem;
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.sidebar-logo { width:32px; height:auto; }

.sidebar-nav {
  display:flex; flex-direction:column;
  padding:0.75rem 0.5rem;
  flex:1;
}
.nav-item {
  display:flex; align-items:center; gap:0.6rem;
  padding:0.6rem 0.75rem; border-radius:8px;
  color:rgba(255,255,255,0.65);
  text-decoration:none; font-size:0.85rem; font-weight:500;
  cursor:pointer; transition:all 0.15s;
  margin-bottom:2px;
}
.nav-item:hover { color:#fff; background:rgba(255,255,255,0.08); }
.nav-item.active { color:#fff; background:var(--accent); }
.nav-icon { font-size:1rem; width:20px; text-align:center; }

.sidebar-footer {
  padding:1rem; border-top:1px solid rgba(255,255,255,0.08);
  font-size:0.75rem;
}
.sidebar-status span { display:block; font-weight:600; }
.sidebar-status small { color:rgba(255,255,255,0.5); }
.sidebar-scheduler { display:flex; align-items:center; gap:0.4rem; margin:0.5rem 0; }
.dot { width:8px; height:8px; border-radius:50%; display:inline-block; }
.dot.on { background:var(--success); }
.dot.off { background:var(--muted); }
#logout-btn { width:100%; margin-top:0.5rem; }

.main-content {
  flex:1; margin-left:var(--sidebar-w);
  padding:0 2rem 2rem;
}
.topbar {
  height:var(--topbar-h);
  display:flex; align-items:center; justify-content:space-between;
  border-bottom:1px solid var(--line);
  margin-bottom:1.5rem;
  position:sticky; top:0; background:var(--bg); z-index:50;
}
.topbar h1 { font-size:1.2rem; font-weight:700; }
.topbar-stats { display:flex; gap:1.5rem; font-size:0.8rem; }
.topbar-stat { text-align:center; }
.topbar-stat strong { display:block; color:var(--accent); font-size:1rem; }
.topbar-stat small { color:var(--muted); text-transform:uppercase; font-size:0.65rem; letter-spacing:0.05em; }

.page { display:none; }
.page.active { display:block; }

.btn-primary {
  display:inline-block; padding:0.55rem 1.2rem;
  background:var(--accent); color:#fff; border:none;
  border-radius:8px; font-size:0.85rem; font-weight:600;
  cursor:pointer; text-decoration:none; transition:background 0.15s;
}
.btn-primary:hover { background:var(--accent-dark); }
.btn-small {
  padding:0.3rem 0.7rem; border:1px solid var(--line); border-radius:6px;
  background:var(--surface); color:var(--ink); cursor:pointer; font-size:0.78rem;
}
.btn-small:hover { background:var(--accent-soft); border-color:var(--accent); }
.btn-danger { border-color:var(--danger); color:var(--danger); }
.btn-danger:hover { background:#fef2f2; }

.cards-grid { display:grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap:1rem; }

.card {
  background:var(--surface-strong); border:1px solid var(--line);
  border-radius:14px; padding:1.25rem;
}
.card h3 { font-size:0.9rem; margin-bottom:0.75rem; display:flex; align-items:center; gap:0.5rem; }
.card-row { display:flex; justify-content:space-between; padding:0.3rem 0; font-size:0.82rem; }
.card-row span { color:var(--muted); }
.card-row strong { color:var(--ink); }

.metric-cards { display:grid; grid-template-columns: repeat(4, 1fr); gap:1rem; margin-bottom:1.5rem; }
.metric-card {
  background:var(--surface-strong); border:1px solid var(--line);
  border-radius:12px; padding:1rem; text-align:center;
}
.metric-card .val { font-size:1.8rem; font-weight:700; color:var(--accent); }
.metric-card .lbl { font-size:0.7rem; color:var(--muted); text-transform:uppercase; letter-spacing:0.06em; margin-top:0.2rem; }
.metric-card.warn .val { color:var(--warn); }
.metric-card.danger .val { color:var(--danger); }

.alert-bar {
  padding:0.75rem 1rem; border-radius:10px; margin-bottom:1rem;
  display:flex; align-items:center; gap:0.5rem; font-size:0.82rem;
}
.alert-bar.warning { background:#fefce8; border:1px solid #fde68a; }
.alert-bar.critical { background:#fef2f2; border:1px solid #fecaca; }

.panel {
  background:var(--surface-strong); border:1px solid var(--line);
  border-radius:14px; padding:1.25rem; margin-bottom:1rem;
}
.panel-header {
  display:flex; justify-content:space-between; align-items:center;
  margin-bottom:1rem; flex-wrap:wrap; gap:0.5rem;
}
.panel-header h2 { font-size:1.1rem; }

.search-bar { display:flex; gap:0.5rem; align-items:center; flex-wrap:wrap; }
.search-bar input, .search-bar select {
  padding:0.45rem 0.7rem; border:1px solid var(--line); border-radius:8px;
  font-size:0.82rem; background:var(--surface); color:var(--ink);
}
.search-bar input:focus, .search-bar select:focus { outline:none; border-color:var(--accent); }

table { width:100%; border-collapse:collapse; font-size:0.82rem; }
thead th {
  text-align:left; padding:0.6rem 0.5rem;
  border-bottom:2px solid var(--line);
  font-size:0.7rem; text-transform:uppercase;
  letter-spacing:0.05em; color:var(--muted);
}
tbody td { padding:0.55rem 0.5rem; border-bottom:1px solid var(--line); }
tbody tr:hover { background:var(--accent-soft); }

.badge {
  display:inline-block; padding:0.12rem 0.45rem; border-radius:999px;
  font-size:0.65rem; font-weight:700; text-transform:uppercase;
  letter-spacing:0.03em; white-space:nowrap;
}
.badge-active, .badge-pending_activation { background:var(--accent-soft); color:var(--accent); }
.badge-suspended { background:#fef3c7; color:var(--warn); }
.badge-churned { background:#fee2e2; color:var(--danger); }
.badge-success { background:#dcfce7; color:var(--success); }
.badge-failed { background:#fee2e2; color:var(--danger); }

.pagination { display:flex; align-items:center; gap:0.5rem; margin-top:0.75rem; font-size:0.8rem; color:var(--muted); }
.pagination button {
  padding:0.25rem 0.6rem; border:1px solid var(--line); border-radius:5px;
  background:var(--surface); cursor:pointer; font-size:0.75rem;
}
.pagination button:hover { background:var(--accent-soft); }

.modal-overlay {
  position:fixed; inset:0; z-index:200;
  background:rgba(0,0,0,0.3);
  display:flex; align-items:center; justify-content:center;
}
.modal {
  background:var(--surface-strong); border-radius:16px;
  padding:2rem; width:600px; max-width:90%; max-height:85vh; overflow-y:auto;
  box-shadow:0 20px 50px rgba(0,0,0,0.2);
}
.modal h2 { margin-bottom:1rem; }
.modal-close {
  float:right; background:none; border:none; font-size:1.5rem;
  cursor:pointer; color:var(--muted);
}

.form-group { margin-bottom:0.75rem; }
.form-group label { display:block; font-size:0.78rem; font-weight:600; color:var(--muted); margin-bottom:0.2rem; }
.form-group input, .form-group select, .form-group textarea {
  width:100%; padding:0.5rem; border:1px solid var(--line); border-radius:8px;
  font-size:0.85rem; background:var(--surface);
}
.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:0.75rem; }

.svc-grid { display:grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap:1rem; }
.svc-card {
  background:var(--surface-strong); border:1px solid var(--line);
  border-radius:12px; padding:1.25rem; display:flex; flex-direction:column; gap:0.75rem;
  cursor:pointer; transition:box-shadow 0.2s;
}
.svc-card:hover { box-shadow:var(--shadow); }
.svc-card-top { display:flex; justify-content:space-between; align-items:center; }
.svc-card-top h3 { margin:0; font-size:0.95rem; }
.svc-card-metrics { display:grid; grid-template-columns:1fr 1fr; gap:0.5rem; }
.svc-card-metric { text-align:center; padding:0.4rem; background:rgba(15,118,110,0.04); border-radius:6px; }
.svc-card-metric span { display:block; font-size:1.1rem; font-weight:700; color:var(--accent); }
.svc-card-metric small { font-size:0.6rem; color:var(--muted); text-transform:uppercase; }

.empty-state { text-align:center; padding:2rem; color:var(--muted); }
.error-state { color:var(--danger); }
code { background:var(--accent-soft); padding:0.1rem 0.3rem; border-radius:4px; font-size:0.8rem; }

@media (max-width:768px) {
  .sidebar { width:100%; height:auto; position:relative; }
  .sidebar-nav { flex-direction:row; flex-wrap:wrap; }
  .main-content { margin-left:0; padding:0 1rem 1rem; }
  .metric-cards { grid-template-columns:repeat(2, 1fr); }
  .cards-grid, .svc-grid { grid-template-columns:1fr; }
  .form-row { grid-template-columns:1fr; }
}