:root {
    /* Colores principales ELECOM */
    --elecom-primary: #0d6efd;
    --elecom-primary-dark: #0a58ca;
    --elecom-primary-light: #3d8bfd;
    --elecom-secondary: #1a1a2e;
    --elecom-accent: #ffc107;
    --elecom-accent-dark: #e0a800;

    /* Backgrounds */
    --elecom-bg-dark: #0f0f23;
    --elecom-bg-light: #f8f9fa;
    --elecom-card-bg: #ffffff;
    --elecom-sidebar-bg: #1a1a2e;

    /* Texto */
    --elecom-text-dark: #212529;
    --elecom-text-muted: #6c757d;
    --elecom-text-light: #ffffff;

    /* Estados de cuotas */
    --estado-pendiente: #ffc107;
    --estado-pagada: #198754;
    --estado-vencida: #dc3545;
    --estado-parcial: #0dcaf0;

    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #0f0f23 100%);
    --gradient-accent: linear-gradient(135deg, #ffc107 0%, #e0a800 100%);

    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--elecom-bg-light);
    color: var(--elecom-text-dark);
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 260px;
    height: 100vh;
    background: var(--gradient-dark);
    color: var(--elecom-text-light);
    z-index: 1000;
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.sidebar-header {
    padding: 1.5rem;
    padding-top: calc(1.5rem + env(safe-area-inset-top, 0px));
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-logo {
    height: 40px;
    width: auto;
}

.sidebar-brand {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--elecom-text-light);
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-item {
    margin: 0.25rem 0.75rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--elecom-text-light);
}

.nav-link.active {
    background: var(--elecom-primary);
    color: var(--elecom-text-light);
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

/* Main Content */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Top Navbar */
.top-navbar {
    background: var(--elecom-card-bg);
    padding: 1rem 1.5rem;
    padding-top: calc(1rem + env(safe-area-inset-top, 0px));
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

/* PWA iOS Safe Area */
@supports (padding-top: env(safe-area-inset-top)) {
    .top-navbar {
        padding-top: calc(1rem + env(safe-area-inset-top));
    }
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--elecom-text-dark);
    cursor: pointer;
    padding: 0.5rem;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--elecom-text-dark);
    margin: 0;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-icon {
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--elecom-text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    position: relative;
}

.navbar-icon:hover {
    background: var(--elecom-bg-light);
    color: var(--elecom-primary);
}

.navbar-icon .badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--estado-vencida);
    color: white;
    font-size: 0.65rem;
    padding: 0.15rem 0.35rem;
    border-radius: 50%;
}

.user-dropdown {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s ease;
}

.user-dropdown:hover {
    background: var(--elecom-bg-light);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--elecom-text-dark);
}

.user-role {
    font-size: 0.75rem;
    color: var(--elecom-text-muted);
}

/* Content Area */
.content-area {
    padding: 1.5rem;
}

/* Cards */
.card {
    background: var(--elecom-card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: none;
    overflow: hidden;
}

.card-header {
    background: transparent;
    border-bottom: 1px solid #e9ecef;
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 1.25rem;
}

/* Stat Cards */
.stat-card {
    background: var(--elecom-card-bg);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.stat-card-icon.primary {
    background: rgba(13, 110, 253, 0.1);
    color: var(--elecom-primary);
}

.stat-card-icon.success {
    background: rgba(25, 135, 84, 0.1);
    color: var(--estado-pagada);
}

.stat-card-icon.warning {
    background: rgba(255, 193, 7, 0.1);
    color: var(--estado-pendiente);
}

.stat-card-icon.danger {
    background: rgba(220, 53, 69, 0.1);
    color: var(--estado-vencida);
}

.stat-card-icon.info {
    background: rgba(13, 202, 240, 0.1);
    color: var(--estado-parcial);
}

.stat-card-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--elecom-text-dark);
    margin-bottom: 0.25rem;
}

.stat-card-label {
    font-size: 0.875rem;
    color: var(--elecom-text-muted);
}

/* Buttons */
.btn {
    border-radius: var(--radius-sm);
    padding: 0.5rem 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--elecom-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--elecom-bg-dark);
}

.btn-success {
    background: var(--estado-pagada);
    color: white;
}

.btn-warning {
    background: var(--estado-pendiente);
    color: var(--elecom-text-dark);
}

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

.btn-outline-primary {
    background: transparent;
    border: 1px solid var(--elecom-primary);
    color: var(--elecom-primary);
}

.btn-outline-primary:hover {
    background: var(--elecom-primary);
    color: white;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Form Controls */
.form-control, .form-select {
    border-radius: var(--radius-sm);
    border: 1px solid #dee2e6;
    padding: 0.625rem 0.875rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--elecom-primary);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
    outline: none;
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--elecom-text-dark);
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--elecom-bg-light);
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: var(--elecom-text-dark);
    padding: 0.875rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.table tbody td {
    padding: 0.875rem;
    vertical-align: middle;
    border-bottom: 1px solid #e9ecef;
}

.table tbody tr:hover {
    background: rgba(13, 110, 253, 0.02);
}

/* Badges */
.badge {
    padding: 0.35rem 0.65rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.75rem;
}

.badge-pendiente {
    background: rgba(255, 193, 7, 0.15);
    color: #856404;
}

.badge-pagada {
    background: rgba(25, 135, 84, 0.15);
    color: #0f5132;
}

.badge-vencida {
    background: rgba(220, 53, 69, 0.15);
    color: #842029;
}

.badge-parcial {
    background: rgba(13, 202, 240, 0.15);
    color: #055160;
}

/* Modals */
.modal-content {
    border-radius: var(--radius-md);
    border: none;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    border-bottom: 1px solid #e9ecef;
    padding: 1.25rem 1.5rem;
}

.modal-title {
    font-weight: 600;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid #e9ecef;
    padding: 1rem 1.5rem;
}

/* Alerts */
.alert {
    border-radius: var(--radius-sm);
    border: none;
    padding: 1rem 1.25rem;
}

.alert-success {
    background: rgba(25, 135, 84, 0.1);
    color: #0f5132;
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    color: #842029;
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #856404;
}

.alert-info {
    background: rgba(13, 202, 240, 0.1);
    color: #055160;
}

/* Calendar Overrides */
.fc {
    font-family: 'Inter', sans-serif;
}

.fc .fc-toolbar-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.fc .fc-button-primary {
    background: var(--elecom-primary);
    border-color: var(--elecom-primary);
}

.fc .fc-button-primary:hover {
    background: var(--elecom-primary-dark);
    border-color: var(--elecom-primary-dark);
}

.fc .fc-day-today {
    background: rgba(13, 110, 253, 0.05) !important;
}

.fc-event {
    border-radius: var(--radius-sm);
    padding: 0.15rem 0.35rem;
    font-size: 0.8rem;
    border: none !important;
}

.fc-event-pendiente {
    background: var(--estado-pendiente) !important;
    color: var(--elecom-text-dark) !important;
}

.fc-event-pagada {
    background: var(--estado-pagada) !important;
    color: white !important;
}

.fc-event-vencida {
    background: var(--estado-vencida) !important;
    color: white !important;
}

.fc-event-parcial {
    background: var(--estado-parcial) !important;
    color: var(--elecom-text-dark) !important;
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--elecom-card-bg);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 0.5rem 0;
}

.mobile-nav-items {
    display: flex;
    justify-content: space-around;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.mobile-nav-item {
    flex: 1;
}

.mobile-nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    color: var(--elecom-text-muted);
    text-decoration: none;
    font-size: 0.7rem;
    transition: color 0.2s ease;
}

.mobile-nav-link i {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.mobile-nav-link.active {
    color: var(--elecom-primary);
}

/* Responsive */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .sidebar-toggle {
        display: block;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .mobile-nav {
        display: block;
    }

    .content-area {
        padding-bottom: 5rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-card-value {
        font-size: 1.5rem;
    }

    .user-info {
        display: none;
    }
}

@media (max-width: 575px) {
    .content-area {
        padding: 1rem;
        padding-bottom: 5rem;
    }

    .page-title {
        font-size: 1rem;
    }

    .card-body {
        padding: 1rem;
    }

    .table-responsive {
        font-size: 0.85rem;
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* Loader */
.loader {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--elecom-bg-light);
    border-top-color: var(--elecom-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--elecom-text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h5 {
    margin-bottom: 0.5rem;
    color: var(--elecom-text-dark);
}

/* Progress Bar */
.progress {
    height: 8px;
    border-radius: 4px;
    background: var(--elecom-bg-light);
    overflow: hidden;
}

.progress-bar {
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Login Page Styles */
.login-page {
    min-height: 100vh;
    background: var(--gradient-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-card {
    background: var(--elecom-card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 420px;
    padding: 2.5rem;
}

.login-logo {
    display: block;
    margin: 0 auto 1.5rem;
    max-height: 60px;
}

.login-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--elecom-text-dark);
    margin-bottom: 0.5rem;
}

.login-subtitle {
    text-align: center;
    color: var(--elecom-text-muted);
    margin-bottom: 2rem;
}

.login-footer {
    text-align: center;
    color: var(--elecom-text-muted);
    font-size: 0.85rem;
    margin-top: 2rem;
}

.login-footer a {
    color: var(--elecom-primary);
    text-decoration: none;
}

/* Utility Classes */
.text-primary { color: var(--elecom-primary) !important; }
.text-success { color: var(--estado-pagada) !important; }
.text-warning { color: var(--estado-pendiente) !important; }
.text-danger { color: var(--estado-vencida) !important; }
.text-info { color: var(--estado-parcial) !important; }
.text-muted { color: var(--elecom-text-muted) !important; }

.bg-primary { background-color: var(--elecom-primary) !important; }
.bg-success { background-color: var(--estado-pagada) !important; }
.bg-warning { background-color: var(--estado-pendiente) !important; }
.bg-danger { background-color: var(--estado-vencida) !important; }

.fw-medium { font-weight: 500; }
.fw-semibold { font-weight: 600; }

/* Currency Format */
.currency {
    font-variant-numeric: tabular-nums;
}

/* Action Buttons Group */
.action-btns {
    display: flex;
    gap: 0.5rem;
}

.action-btns .btn {
    padding: 0.375rem 0.5rem;
}

/* Quick Actions */
.quick-action {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem;
    background: var(--elecom-bg-light);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--elecom-text-dark);
    transition: all 0.2s ease;
}

.quick-action:hover {
    background: rgba(13, 110, 253, 0.1);
    color: var(--elecom-primary);
}

.quick-action i {
    font-size: 1.25rem;
    color: var(--elecom-primary);
}

/* DataTables Custom */
.dataTables_wrapper .dataTables_filter input {
    border-radius: var(--radius-sm);
    border: 1px solid #dee2e6;
    padding: 0.5rem 0.75rem;
}

.dataTables_wrapper .dataTables_length select {
    border-radius: var(--radius-sm);
    border: 1px solid #dee2e6;
    padding: 0.375rem 0.5rem;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    border-radius: var(--radius-sm);
    border: none !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--elecom-primary) !important;
    color: white !important;
}