: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);
  --glass: rgba(255, 255, 255, 0.02);
}

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: 0;
  min-height: 100vh;
}

/* --- LAYOUT --- */
#admin-container {
  display: flex;
  min-height: 100vh;
  animation: fadeIn 0.4s ease-out;
}

/* --- SIDEBAR --- */
#sidebar {
  width: 220px;
  min-width: 220px;
  background: rgba(0,0,0,0.4);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.sidebar-logo { height: 32px; filter: drop-shadow(0 0 8px rgba(59,130,246,0.4)); }
.sidebar-title { font-size: 0.9rem; font-weight: 800; letter-spacing: -0.3px; }

.sidebar-nav { display: flex; flex-direction: column; gap: 4px; padding: 0 12px; flex: 1; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
  width: 100%;
}
.nav-item:hover { background: rgba(255,255,255,0.05); color: white; }
.nav-item.active { background: rgba(59,130,246,0.12); color: var(--primary); }
.nav-icon { font-size: 1rem; }

.sidebar-footer {
  padding: 16px 20px 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sidebar-user { font-size: 0.8rem; color: var(--text-dim); font-weight: 600; }
.btn-logout {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s;
  text-align: center;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

/* --- MAIN CONTENT --- */
#main-content {
  flex: 1;
  padding: 32px 36px;
  overflow-y: auto;
  max-width: 1100px;
}

/* --- VIEWS --- */
.view { display: none; }
.view.active { display: block; animation: fadeIn 0.3s ease-out; }

.view-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}
.view-title { margin: 0; font-size: 1.3rem; font-weight: 800; }

/* --- LOGIN INPUT --- */
.admin-input {
  width: 100%;
  padding: 10px 14px;
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: white;
  font-size: 0.95rem;
  box-sizing: border-box;
  outline: none;
}
.admin-input:focus { border-color: var(--primary); }

/* --- CABECERA --- */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 20px;
}

.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; }

/* --- ANALYTICS & CHARTS --- */
.analytics-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); /* Responsivo automático */
  gap: 20px;
  margin-bottom: 30px;
}

/* El box de horas tendrá preferencia de espacio en pantallas grandes */
@media (min-width: 900px) {
  .analytics-container { grid-template-columns: 1.8fr 1.2fr; }
}

.chart-box {
  background: var(--card-bg);
  padding: 25px;
  border-radius: 20px;
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
}

.chart-box h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 20px;
  margin-top: 0;
}

canvas { width: 100% !important; height: auto !important; max-height: 300px; }

/* --- SUMMARY KPIs --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: var(--card-bg);
  padding: 25px;
  border-radius: 20px;
  border: 1px solid var(--border);
  text-align: center;
  transition: all 0.3s ease;
}

.stat-card:hover { transform: translateY(-5px); border-color: var(--primary); background: rgba(59, 130, 246, 0.05); }
.stat-label { color: var(--text-dim); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; display: block; }
.stat-value { font-size: 2rem; font-weight: 800; color: white; }

/* --- SITES --- */
.sites-card {
  background: rgba(16, 185, 129, 0.03);
  border: 1px solid rgba(16, 185, 129, 0.15);
  padding: 30px;
  border-radius: 24px;
  margin-bottom: 40px;
}

.sites-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}

.sites-header h2 { margin: 0; font-size: 1.1rem; color: var(--success); }

.btn-new-site {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 10px 18px;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s;
}
.btn-new-site:hover { background: var(--success); color: #000; }

.site-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

.site-form-actions { display: flex; gap: 12px; }

.btn-cancel {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s;
}
.btn-cancel:hover { border-color: var(--danger); color: var(--danger); }

.btn-edit-site {
  background: rgba(59, 130, 246, 0.08);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.2);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s;
}
.btn-edit-site:hover { background: var(--primary); color: #fff; }

.sites-table-wrapper { margin-top: 20px; }

.hw-badge {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}
.hw-mikrotik { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.hw-unifi    { background: rgba(59, 130, 246, 0.1);  color: var(--primary); }

.admin-select {
  width: 100%;
  background: #000;
  border: 1px solid #2d3748;
  color: var(--primary);
  padding: 12px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  outline: none;
}

.admin-textarea {
  width: 100%;
  background: #000;
  border: 1px solid #2d3748;
  color: var(--primary);
  padding: 12px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.85rem;
  font-family: 'Inter', monospace;
  resize: vertical;
  outline: none;
  box-sizing: border-box;
}
.admin-textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(59,130,246,0.2); }

/* --- SETTINGS --- */
.settings-card {
  background: rgba(59, 130, 246, 0.04);
  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(180px, 1fr)); 
  gap: 20px; 
  align-items: flex-end; 
}

.input-group label { display: block; font-size: 0.8rem; color: var(--text-dim); margin-bottom: 8px; }
.input-group input {
  width: 100%;
  background: #000;
  border: 1px solid #2d3748;
  color: var(--primary);
  padding: 12px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  outline: none;
  box-sizing: border-box;
}

/* --- TABLA --- */
.table-wrapper {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow-x: auto; /* Scroll horizontal si es necesario */
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

table { width: 100%; border-collapse: collapse; min-width: 700px; }
th { background: rgba(255,255,255,0.02); color: var(--text-dim); text-transform: uppercase; font-size: 0.65rem; padding: 20px; letter-spacing: 1px; text-align: left; }
td { padding: 18px 20px; border-bottom: 1px solid rgba(255,255,255,0.03); font-size: 0.9rem; }

/* Columna OS y Conexiones */
.os-tag {
  background: rgba(255,255,255,0.05);
  color: #fff;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  border: 1px solid var(--border);
  font-weight: 600;
}

.count-bubble {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 30px;
  font-weight: 800;
  font-size: 0.8rem;
}

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

/* Botones */
.btn-save {
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s;
}

.btn-refresh { 
  background: var(--glass); 
  border: 1px solid var(--border); 
  color: white; 
  padding: 10px 18px; 
  border-radius: 10px; 
  cursor: pointer; 
  font-weight: 600;
}

/* Ajuste para el select de media */
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%233b82f6'%3微path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  cursor: pointer;
}

#inp-media-url {
  transition: border-color 0.3s;
}

#inp-media-url:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.btn-refresh:hover { background: white; color: black; }

/* --- USERS TABLE HEADER --- */
.table-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}
.table-section-title { margin: 0; font-size: 1.1rem; color: var(--text-dim); font-weight: 600; }
.table-controls { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* Site tag in user table */
.site-tag {
  background: rgba(139, 92, 246, 0.1);
  color: #a78bfa;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid rgba(139, 92, 246, 0.2);
  white-space: nowrap;
}

/* --- PAGINATION --- */
.pagination-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 20px;
  margin-bottom: 40px;
}
.page-info { color: var(--text-dim); font-size: 0.85rem; }
.btn-page {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: white;
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: 0.2s;
}
.btn-page:hover:not(:disabled) { background: var(--primary); border-color: var(--primary); }
.btn-page:disabled { opacity: 0.3; cursor: not-allowed; }

/* --- LOGO UPLOAD --- */
.logo-upload-area {
  background: rgba(0,0,0,0.3);
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.btn-upload {
  background: rgba(59,130,246,0.1);
  color: var(--primary);
  border: 1px solid rgba(59,130,246,0.3);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s;
  white-space: nowrap;
}
.btn-upload:hover { background: var(--primary); color: #fff; }

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