:root {
  --bg-admin: #05070a;
  --card-bg: rgba(255, 255, 255, 0.03);
  --primary: #3b82f6;
  --danger: #ef4444;
  --success: #10b981;
  --text-dim: #94a3b8;
  --border: rgba(255, 255, 255, 0.08);
}

body {
  background: radial-gradient(circle at top, #1a202c 0%, var(--bg-admin) 100%);
  color: white;
  font-family: 'Inter', system-ui, sans-serif;
  margin: 0;
  padding: 40px 20px;
  display: flex;
  justify-content: center;
  min-height: 100vh;
}

#admin-container {
  width: 100%;
  max-width: 1100px;
  animation: fadeIn 0.5s ease-out;
}

/* --- CABECERA --- */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.brand { display: flex; align-items: center; gap: 15px; }
#admin-logo { height: 45px; filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.3)); }
h1 { font-size: 1.5rem; margin: 0; font-weight: 800; letter-spacing: -0.5px; }

/* --- SUMMARY DASHBOARD (KPIs) --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 20px;
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  text-align: center;
  transition: transform 0.3s ease;
}

.stat-card:hover { transform: translateY(-5px); border-color: var(--primary); }
.stat-label { color: var(--text-dim); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; display: block; }
.stat-value { font-size: 2.5rem; font-weight: 800; color: white; }

/* --- SETTINGS CARD --- */
.settings-card {
  background: rgba(59, 130, 246, 0.05);
  border: 1px solid rgba(59, 130, 246, 0.2);
  padding: 30px;
  border-radius: 24px;
  margin-bottom: 40px;
}

.settings-header { display: flex; align-items: center; gap: 10px; margin-bottom: 25px; }
.settings-header h2 { margin: 0; font-size: 1.1rem; color: var(--primary); }

.settings-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); 
  gap: 25px; 
  align-items: flex-end; 
}

.input-group label { display: block; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 10px; }
.input-group input {
  width: 100%;
  background: #000;
  border: 1px solid #2d3748;
  color: var(--primary);
  padding: 12px 15px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 1rem;
  outline: none;
  box-sizing: border-box;
}

.input-group input:focus { border-color: var(--primary); box-shadow: 0 0 10px rgba(59, 130, 246, 0.2); }

.btn-save {
  background: var(--primary);
  color: white;
  border: none;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-save:hover { filter: brightness(1.2); transform: scale(1.02); }

/* --- TABLA DE USUARIOS --- */
.table-wrapper {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

table { width: 100%; border-collapse: collapse; }
th { background: rgba(255,255,255,0.02); color: var(--text-dim); text-transform: uppercase; font-size: 0.7rem; padding: 20px; letter-spacing: 1px; }
td { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.03); font-size: 0.9rem; }

/* Burbuja de Conexiones */
.count-bubble {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 30px;
  font-weight: 800;
  font-size: 0.8rem;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Badges */
.badge { padding: 6px 12px; border-radius: 8px; font-size: 0.7rem; font-weight: 800; }
.badge-active { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.badge-expired { background: rgba(239, 68, 68, 0.1); color: var(--danger); }

.btn-refresh { background: transparent; border: 1px solid var(--border); color: white; padding: 8px 16px; border-radius: 10px; cursor: pointer; font-size: 0.85rem; }
.btn-refresh:hover { background: white; color: black; }

/* --- UTILS --- */
#error-log:not(:empty) {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  padding: 15px;
  border-radius: 12px;
  margin-top: 20px;
  text-align: center;
  font-size: 0.85rem;
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }