/* Variables CSS para temas */
:root {
    /* Modo claro */
    --bg-primary: #667eea;
    --bg-secondary: #764ba2;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-card-hover: rgba(255, 255, 255, 1);
    --text-primary: #333;
    --text-secondary: #2c3e50;
    --text-muted: #7f8c8d;
    --border-color: #e0e0e0;
    --shadow-color: rgba(31, 38, 135, 0.37);
    --header-bg: rgba(255, 255, 255, 0.95);
    --input-bg: #f8f9fa;
    --success-bg: #e8f5e8;
    --success-text: #2e7d32;
    --warning-bg: #fff3cd;
    --warning-text: #856404;
    --danger-bg: #f8d7da;
    --danger-text: #721c24;
}

/* Modo nocturno */
[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: rgba(30, 39, 53, 0.95);
    --bg-card-hover: rgba(30, 39, 53, 1);
    --text-primary: #e0e0e0;
    --text-secondary: #f8f9fa;
    --text-muted: #bbb;
    --border-color: #444;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --header-bg: rgba(30, 39, 53, 0.95);
    --input-bg: #2c3e50;
    --success-bg: rgba(76, 175, 80, 0.2);
    --success-text: #4caf50;
    --warning-bg: rgba(255, 152, 0, 0.2);
    --warning-text: #ff9800;
    --danger-bg: rgba(244, 67, 54, 0.2);
    --danger-text: #f44336;
}

/* Reset y base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    transition: all 0.3s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px var(--shadow-color);
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.header h1 {
    color: var(--text-secondary);
    font-size: 2.2rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.header-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Botón de modo nocturno */
.theme-toggle {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
    font-size: 1.2rem;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-color);
    border-color: #3498db;
}

.theme-toggle .sun-icon {
    display: block;
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: block;
}

.btn-admin-link {
    background: linear-gradient(135deg, #9C27B0, #7B1FA2);
    color: white;
    border: none;
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(156, 39, 176, 0.3);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-admin-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(156, 39, 176, 0.4);
}

.last-update {
    background: var(--success-bg);
    color: var(--success-text);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-refresh {
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-refresh:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.btn-refresh:active {
    transform: translateY(0);
}

.btn-logout {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.btn-logout:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.btn-logout:active {
    transform: translateY(0);
}

/* Summary Cards */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.summary-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 6px 25px var(--shadow-color);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.summary-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px var(--shadow-color);
    background: var(--bg-card-hover);
}

.summary-card.connected {
    border-color: #4CAF50;
}

.summary-card.warning {
    border-color: #FF9800;
}

.summary-card.disconnected {
    border-color: #f44336;
}

.summary-card.uptime {
    border-color: #2196F3;
}

.summary-card.throughput {
    border-color: #9C27B0;
}

.card-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.connected .card-icon {
    background: linear-gradient(135deg, #4CAF50, #45a049);
}

.warning .card-icon {
    background: linear-gradient(135deg, #FF9800, #f57c00);
}

.disconnected .card-icon {
    background: linear-gradient(135deg, #f44336, #d32f2f);
}

.uptime .card-icon {
    background: linear-gradient(135deg, #2196F3, #1976D2);
}

.throughput .card-icon {
    background: linear-gradient(135deg, #9C27B0, #7B1FA2);
}

.card-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.card-content p {
    color: var(--text-muted);
    font-weight: 500;
}

/* Controls */
.controls {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 6px 25px var(--shadow-color);
    transition: all 0.3s ease;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group label {
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

.quick-filters {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.quick-filter-btn {
    padding: 6px 12px;
    border: 2px solid transparent;
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    border-color: var(--border-color);
}

.quick-filter-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.quick-filter-btn.active {
    border-color: #2196F3;
    background: #2196F3;
    color: white;
}

.quick-filter-btn.connected.active {
    border-color: #4CAF50;
    background: #4CAF50;
    color: white;
}

.quick-filter-btn.warning.active {
    border-color: #FF9800;
    background: #FF9800;
    color: white;
}

.quick-filter-btn.disconnected.active {
    border-color: #f44336;
    background: #f44336;
    color: white;
}

.filter-group select {
    padding: 6px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    background: white;
    font-size: 0.8rem;
    transition: border-color 0.3s ease;
}

.filter-group select:focus {
    outline: none;
    border-color: #2196F3;
}

.auto-refresh {
    display: flex;
    align-items: center;
    gap: 8px;
}

.auto-refresh label {
    color: #2c3e50;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Centers Container */
.centers-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 25px;
    box-shadow: 0 6px 25px rgba(31, 38, 135, 0.37);
}

.centers-container h2 {
    color: #2c3e50;
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-align: center;
}

/* Centers Grid - Ultra-compacto para 30+ centros */
.centers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
    padding: 10px 0;
}

/* Mini Cards para vista compacta */
.center-mini-card {
    background: white;
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
    border-left: 3px solid #e0e0e0;
    cursor: pointer;
    min-height: 60px;
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.center-mini-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    z-index: 10;
}

.center-mini-card.connected {
    border-left-color: #4CAF50;
    background: linear-gradient(135deg, #f8fff8, white);
}

.center-mini-card.warning {
    border-left-color: #FF9800;
    background: linear-gradient(135deg, #fffaf0, white);
    animation: pulse-warning-mini 3s infinite;
}

.center-mini-card.disconnected {
    border-left-color: #f44336;
    background: linear-gradient(135deg, #fff5f5, white);
    animation: pulse-disconnected-mini 2s infinite;
}

@keyframes pulse-warning-mini {
    0%, 100% { box-shadow: 0 2px 8px rgba(255, 152, 0, 0.2); }
    50% { box-shadow: 0 2px 12px rgba(255, 152, 0, 0.4); }
}

@keyframes pulse-disconnected-mini {
    0%, 100% { box-shadow: 0 2px 8px rgba(244, 67, 54, 0.3); }
    50% { box-shadow: 0 2px 15px rgba(244, 67, 54, 0.6); }
}

.status-indicator {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.center-mini-info {
    flex: 1;
    min-width: 0;
}

.center-mini-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: #2c3e50;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.last-seen-mini {
    font-size: 0.75rem;
    font-weight: 500;
}

.last-seen-mini.time-ok {
    color: #4CAF50;
}

.last-seen-mini.time-warning {
    color: #FF9800;
}

.last-seen-mini.time-critical {
    color: #f44336;
    animation: blink-critical 1s infinite;
}

@keyframes blink-critical {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0.6; }
}

/* Quick Tooltip */
.quick-tooltip {
    position: fixed;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    max-width: 250px;
    z-index: 1000;
    display: none;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.tooltip-header {
    font-weight: 600;
    margin-bottom: 5px;
    color: #fff;
}

.tooltip-status {
    margin-bottom: 3px;
    font-weight: 500;
}

.tooltip-status.connected {
    color: #4CAF50;
}

.tooltip-status.warning {
    color: #FF9800;
}

.tooltip-status.disconnected {
    color: #f44336;
}

.tooltip-time {
    margin-bottom: 2px;
}

.tooltip-date {
    font-size: 0.75rem;
    opacity: 0.8;
}

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    font-size: 1.2rem;
    color: #666;
    grid-column: 1 / -1;
}

.fa-spinner {
    margin-right: 10px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    background: linear-gradient(135deg, #f44336, #d32f2f);
    color: white;
    padding: 20px;
    border-radius: 15px 15px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.close {
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: 25px;
    font-size: 1.1rem;
    color: #333;
}

.modal-footer {
    padding: 0 25px 25px;
    text-align: right;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(33, 150, 243, 0.4);
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px 20px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.footer p {
    margin-bottom: 5px;
}

/* Responsive Design - Optimizado para vista compacta */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 1.6rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .summary-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .centers-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 6px;
    }
    
    .controls {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .quick-filters {
        justify-content: center;
    }
    
    .quick-filter-btn {
        font-size: 0.7rem;
        padding: 5px 8px;
    }
    
    .center-mini-card {
        min-height: 55px;
        padding: 8px;
    }
    
    .center-mini-name {
        font-size: 0.8rem;
    }
    
    .last-seen-mini {
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .summary-grid {
        grid-template-columns: 1fr;
    }
    
    .centers-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
    
    .quick-filter-btn {
        font-size: 0.65rem;
        padding: 4px 6px;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.center-card {
    animation: fadeIn 0.5s ease forwards;
}

/* Utility Classes */
.text-success { color: #4CAF50; }
.text-warning { color: #FF9800; }
.text-danger { color: #f44336; }
.text-info { color: #2196F3; }

.bg-success { background-color: #4CAF50; }
.bg-warning { background-color: #FF9800; }
.bg-danger { background-color: #f44336; }
.bg-info { background-color: #2196F3; }