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

:root {
    --primary-bg: #0a0a0a;
    --secondary-bg: #1a1a1a;
    --tertiary-bg: #2a2a2a;
    --accent-color: #00ff88;
    --accent-hover: #00cc6a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --border-color: #333333;
    --danger: #ff4444;
    --warning: #ffaa00;
    --info: #0099ff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-bg) 0%, #1a1a2e 50%, var(--primary-bg) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Layout principal */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: var(--secondary-bg);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.sidebar-header h1 {
    color: var(--accent-color);
    font-size: 1.5rem;
    font-weight: 300;
}

.sidebar-nav ul {
    list-style: none;
    padding: 20px 0;
}

.sidebar-nav li {
    margin-bottom: 5px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
    background: var(--tertiary-bg);
    color: var(--text-primary);
    border-left-color: var(--accent-color);
}

.sidebar-nav a.active {
    background: var(--tertiary-bg);
    color: var(--accent-color);
    border-left-color: var(--accent-color);
}

.sidebar-nav i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

/* Contenido principal */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 20px;
}

/* Header */
.content-header {
    background: var(--secondary-bg);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: between;
    align-items: center;
}

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

.user-badge {
    background: var(--accent-color);
    color: var(--primary-bg);
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: bold;
}

/* Tarjetas */
.card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 255, 136, 0.1);
}

.card-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 15px;
    display: flex;
    justify-content: between;
    align-items: center;
}

.card-title {
    color: var(--accent-color);
    font-size: 1.2rem;
    font-weight: 500;
}

/* Formularios */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    background: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.1);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23666' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 10px center;
    background-repeat: no-repeat;
    background-size: 16px;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    gap: 8px;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--primary-bg);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--tertiary-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #cc3333;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
}

/* Tablas */
.table {
    width: 100%;
    background: var(--secondary-bg);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.table th,
.table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--tertiary-bg);
    color: var(--accent-color);
    font-weight: 500;
}

.table tbody tr:hover {
    background: var(--tertiary-bg);
}

/* Grid system */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.col {
    flex: 1;
    padding: 0 10px;
}

.col-6 {
    flex: 0 0 50%;
    padding: 0 10px;
}

.col-4 {
    flex: 0 0 33.333%;
    padding: 0 10px;
}

.col-3 {
    flex: 0 0 25%;
    padding: 0 10px;
}

/* Alertas */
.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.alert-error {
    background: rgba(255, 68, 68, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

.alert-warning {
    background: rgba(255, 170, 0, 0.1);
    border-color: var(--warning);
    color: var(--warning);
}

/* Login page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-bg) 0%, #1a1a2e 100%);
}

.login-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: var(--accent-color);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--text-secondary);
}

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

.stat-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-color);
    margin: 10px 0;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Charts */
.chart-container {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .row {
        flex-direction: column;
    }
    
    .col, .col-6, .col-4, .col-3 {
        flex: 1;
        margin-bottom: 15px;
    }
}

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

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* Scrollbar personalizado */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}