:root {
  --bg: #f0f4f8; --bg2: #ffffff; --bg3: #f8fafc;
  --surface: #ffffff; --border: #e2e8f0;
  --text: #1e293b; --text2: #64748b;
  --accent: #2563eb; --accent2: #1d4ed8;
  --green: #10b981; --orange: #f59e0b;
  --red: #ef4444; --blue: #3b82f6; --purple: #8b5cf6;
  --radius: 12px; --radius-sm: 8px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
.input {
  width: 100%; padding: 10px 14px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font-size: 0.9rem; font-family: inherit;
}
.input:focus { outline: none; border-color: var(--accent); }
.input-sm { width: auto; min-width: 160px; display: inline-block; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.85rem; border: none;
  cursor: pointer; transition: all .2s;
}
.btn-sm { padding: 7px 14px; font-size: 0.8rem; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent2); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text2); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { opacity: 0.85; }
.btn-success { background: var(--green); color: #fff; }
.btn-warning { background: var(--orange); color: #fff; }
.btn-full { width: 100%; justify-content: center; }
.btn-xs { padding: 4px 10px; font-size: 0.75rem; }

/* Login */
.login-screen {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 20px;
}
.login-box {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px;
  width: 100%; max-width: 400px; text-align: center;
}
.login-box h2 { margin-bottom: 4px; }
.login-sub { color: var(--text2); font-size: 0.9rem; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; text-align: left; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 600; margin-bottom: 4px; }
.login-error { color: var(--red); font-size: 0.85rem; margin-top: 12px; }
.login-back { display: inline-block; margin-top: 16px; color: var(--text2); font-size: 0.85rem; }
.login-back:hover { color: var(--accent); }

/* Admin App */
.admin-app { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px; background: var(--bg2); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; position: fixed; top: 0; left: 0;
  bottom: 0; z-index: 50;
}
.sidebar-header {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.sidebar-header strong { font-size: 1rem; }
.sidebar-header span { font-size: 0.75rem; color: var(--text2); display: block; }
.sidebar-nav { flex: 1; padding: 8px; display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius-sm);
  color: var(--text2); font-size: 0.85rem; font-weight: 500;
  transition: all .2s;
}
.sidebar-nav a:hover { background: var(--surface); color: var(--text); }
.sidebar-nav a.tab-active { background: rgba(6,182,212,0.1); color: var(--accent); }
.sidebar-footer {
  padding: 12px; border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 4px;
}
.sidebar-footer a, .sidebar-footer button {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: var(--radius-sm);
  color: var(--text2); font-size: 0.8rem; background: none; border: none;
  cursor: pointer; font-family: inherit; width: 100%;
}
.sidebar-footer a:hover, .sidebar-footer button:hover { background: var(--surface); color: var(--text); }

.main-content {
  margin-left: 240px; flex: 1; display: flex; flex-direction: column;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; border-bottom: 1px solid var(--border);
  background: var(--bg2);
}
.topbar h1 { font-size: 1.2rem; font-weight: 700; }
.topbar-date { color: var(--text2); font-size: 0.85rem; }
.sidebar-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.2rem; cursor: pointer; }
.content-area { flex: 1; padding: 24px; overflow-y: auto; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.section-bar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; flex-wrap: wrap; gap: 8px;
}
.section-bar-right { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; display: flex;
  align-items: center; gap: 16px;
}
.stat-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center; font-size: 1.3rem;
}
.stat-icon.blue { background: rgba(59,130,246,0.15); color: var(--blue); }
.stat-icon.green { background: rgba(16,185,129,0.15); color: var(--green); }
.stat-icon.red { background: rgba(239,68,68,0.15); color: var(--red); }
.stat-icon.orange { background: rgba(245,158,11,0.15); color: var(--orange); }
.stat-icon.purple { background: rgba(139,92,246,0.15); color: var(--purple); }
.stat-icon.cyan { background: rgba(6,182,212,0.15); color: var(--accent); }
.stat-info { }
.stat-label { font-size: 0.8rem; color: var(--text2); }
.stat-value { font-size: 1.5rem; font-weight: 700; display: block; }

/* Tables */
.table-responsive { overflow-x: auto; }
.data-table {
  width: 100%; border-collapse: collapse;
  background: var(--surface); border-radius: var(--radius);
  overflow: hidden; font-size: 0.85rem;
}
.data-table th {
  background: var(--bg3); padding: 10px 12px;
  text-align: left; font-weight: 600; white-space: nowrap;
}
.data-table td { padding: 10px 12px; border-top: 1px solid var(--border); }
.data-table tr:hover td { background: rgba(255,255,255,0.02); }

.badge {
  display: inline-flex; padding: 2px 10px; border-radius: 50px;
  font-size: 0.75rem; font-weight: 600;
}
.badge-active { background: rgba(16,185,129,0.15); color: var(--green); }
.badge-expired { background: rgba(239,68,68,0.15); color: var(--red); }
.badge-blocked { background: rgba(245,158,11,0.15); color: var(--orange); }
.badge-pending { background: rgba(245,158,11,0.15); color: var(--orange); }
.badge-confirmed { background: rgba(16,185,129,0.15); color: var(--green); }
.badge-on { background: rgba(16,185,129,0.15); color: var(--green); }
.badge-off { background: rgba(239,68,68,0.15); color: var(--red); }

.online-dot { display:inline-block; width:10px; height:10px; border-radius:50%; }
.online-dot.online { background: #10b981; box-shadow: 0 0 6px rgba(16,185,129,0.6); }
.online-dot.offline { background: #6b7280; }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  display: none; align-items: center; justify-content: center;
  z-index: 200; padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); width: 100%; position: relative;
}
.modal-lg { max-width: 600px; }
.modal-sm { max-width: 400px; }
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 24px; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1.1rem; }
.modal-close { background: none; border: none; color: var(--text2); font-size: 1.2rem; cursor: pointer; }
.modal-body { padding: 24px; }
.form-actions {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 16px 24px; border-top: 1px solid var(--border);
}

/* Settings */
.settings-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; margin-bottom: 16px;
}
.settings-group { margin-bottom: 16px; }
.settings-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 4px; }

.toggle-label { display: flex !important; align-items: center; gap: 10px; cursor: pointer; font-weight: 500 !important; }
.toggle-label input { display: none; }
.toggle-slider { width: 44px; height: 24px; background: var(--border); border-radius: 12px; position: relative; transition: 0.3s; flex-shrink: 0; }
.toggle-slider::after { content: ''; width: 18px; height: 18px; background: #fff; border-radius: 50%; position: absolute; top: 3px; left: 3px; transition: 0.3s; }
.toggle-label input:checked + .toggle-slider { background: var(--accent); }
.toggle-label input:checked + .toggle-slider::after { left: 23px; }

.pagination {
  display: flex; justify-content: center; gap: 4px; margin-top: 16px;
}
.pagination button {
  padding: 6px 12px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 4px; color: var(--text); cursor: pointer; font-size: 0.8rem;
}
.pagination button.active { background: var(--accent); color: #fff; border-color: var(--accent); }

@media (max-width: 768px) {
  .sidebar { width: 100%; position: fixed; z-index: 100; transform: translateX(-100%); transition: .3s; }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .sidebar-toggle { display: block; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}