:root {
    /* Color Palette - Premium Dark Theme Base */
    --bg-dark: #0f1115;
    --bg-panel: #1A1D24;
    --bg-card: #232730;
    --text-primary: #f0f2f5;
    --text-muted: #8b92a5;
    --text-inverse: #ffffff;
    
    /* Vibrant Accents */
    --accent-blue: #3b82f6;      /* Modern Blue */
    --accent-purple: #8b5cf6;    /* Vibrant Purple */
    --accent-green: #10b981;     /* Success Emerald */
    --accent-orange: #f59e0b;    /* Warning Amber */
    
    /* Borders and UI */
    --border-color: #2e3440;
    --hover-overlay: rgba(255, 255, 255, 0.05);

    /* Shadows & Transitions */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-card: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -2px rgba(0,0,0,0.3);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

#app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    max-width: 100%;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 0;
    transition: var(--transition);
}

.logo-container {
    display: flex;
    align-items: center;
    padding: 0 1.5rem 2rem;
    gap: 1rem;
}

.logo-circle {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.3);
}

.nav-menu {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0 1rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
}

.nav-item:hover {
    background-color: var(--hover-overlay);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-item.active {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    border-left: 3px solid var(--accent-blue);
}

/* Profile */
.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.avatar {
    width: 36px;
    height: 36px;
    background-color: var(--accent-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.user-info {
    display: flex;
    flex-direction: column;
}
.user-name { font-size: 0.9rem; font-weight: 600; }
.user-role { font-size: 0.8rem; color: var(--text-muted); }

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 2rem 3rem;
    background: radial-gradient(circle at top right, rgba(26, 29, 36, 1) 0%, var(--bg-dark) 40%);
}

.top-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2.5rem;
}

h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}
.subtitle { color: var(--text-muted); font-size: 0.95rem; }

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), #2563eb);
    color: white;
    box-shadow: 0 4px 10px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(59, 130, 246, 0.4);
}

/* Dashboard Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card);
    border-color: rgba(255,255,255,0.1);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon.purple { background-color: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }
.stat-icon.blue { background-color: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.stat-icon.green { background-color: rgba(16, 185, 129, 0.15); color: var(--accent-green); }

.stat-details h3 { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: 1.8rem; font-weight: 700; margin-top: 0.25rem; }

/* Views Toggle */
.hidden { display: none; }

/* Tables */
.table-container {
    background-color: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    overflow-x: auto;
    width: 100%;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    /* Removed min-width to prevent forced horizontal scroll */
    border-collapse: collapse;
    table-layout: auto;
}

.data-table th, .data-table td {
    padding: 0.4rem 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.data-table th {
    background-color: rgba(255,255,255,0.02);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.data-table td {
    white-space: normal; /* Allow wrapping to reduce width */
    word-break: break-word; /* Ensure long text doesn't overflow */
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background-color: var(--hover-overlay);
}

.status-badge {
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

.status-pendiente { background-color: rgba(245, 158, 11, 0.15); color: var(--accent-orange); }
.status-curso { background-color: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.status-liquidado { background-color: rgba(16, 185, 129, 0.15); color: var(--accent-green); }

/* Skeleton Loading Animation */
.skeleton-row td span {
    display: block;
    height: 20px;
    background: linear-gradient(90deg, var(--border-color) 25%, #3a4150 50%, var(--border-color) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: 4px;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Modals */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.7);
    display: flex;
    align-items: center; justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal.hidden { display: none; }

.modal-content {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 600px;
    max-width: 95vw;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
}
.filter-bar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    align-items: end;
}

.filter-bar label {
    font-size: 0.75rem !important;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.filter-bar .form-control {
    background: var(--bg-main);
    border-color: var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.close-btn { 
    background: none; 
    border: none; 
    color: var(--text-muted); 
    font-size: 1.8rem; 
    cursor: pointer; 
    transition: color 0.2s, transform 0.2s;
    line-height: 1;
    padding: 0.5rem;
}
.close-btn:hover { 
    color: var(--text-primary); 
    transform: scale(1.1); 
}

.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--text-muted); font-size: 0.9rem; }
.form-control {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
}
.form-control option {
    background-color: var(--bg-dark);
    color: var(--text-primary);
}

.billing-options {
    background-color: rgba(255,255,255,0.02);
    padding: 1.25rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}
.billing-options h4 { font-size: 0.85rem; margin-bottom: 1rem; color: var(--accent-blue); text-transform: uppercase; letter-spacing: 1px; }

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}
.checkbox-label:hover { color: var(--text-primary); }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}
.contract-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
}
.contract-link:hover {
    text-decoration: underline;
}

/* Tabs */
.tabs-container {
    margin-top: 1rem;
}
.tabs-header {
    display: flex;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}
.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    border-bottom: 2px solid transparent;
}
.tab-btn.active {
    color: var(--accent-blue);
    border-bottom: 2px solid var(--accent-blue);
}

.data-table.small {
    font-size: 0.82rem;
    min-width: unset !important;
    width: 100% !important;
}
.data-table.small th, .data-table.small td {
    padding: 0.3rem 0.4rem;
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}
.bg-secondary { background-color: var(--border-color); color: var(--text-muted); }

.accordion-row {
    background-color: rgba(255, 255, 255, 0.01);
}

.accordion-cell {
    padding: 0 !important;
}

.accordion-content {
    padding: 1.5rem 2.5rem;
    border-bottom: 2px solid var(--accent-blue);
    background: linear-gradient(to bottom, var(--bg-panel), var(--bg-dark));
    animation: slideDown 0.3s ease-out;
}

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

.tab-pane-content {
    transition: var(--transition);
}

.account-manager-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 2rem;
    align-items: start;
}

.account-form-sidebar {
    background-color: rgba(255,255,255,0.02);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.account-form-sidebar h4 {
    margin-bottom: 1.5rem;
    color: var(--accent-blue);
    font-size: 1rem;
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-muted);
}.tabs-header-premium {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 0.5rem;
}

.tab-btn-premium {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.tab-btn-premium:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.tab-btn-premium.active {
    background: var(--accent-blue);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.contract-number-link {
    color: #fbbf24 !important;
    text-decoration: none;
    font-weight: 700;
    padding: 3px 8px;
    background-color: rgba(251, 191, 36, 0.15) !important;
    border-radius: 6px;
    border: 1px solid rgba(251, 191, 36, 0.3);
    display: inline-block;
}

.contract-number-link:hover {
    color: #fef08a !important;
    text-decoration: none;
    background-color: rgba(251, 191, 36, 0.25) !important;
}

.progress-bar-container {
    width: 100%;
    background: #2e3440;
    height: 6px;
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    background: #4caf50;
    height: 100%;
    border-radius: 3px;
    transition: width 0.5s ease-in-out;
}
.btn-secondary:hover {
    color: var(--text-primary);
}

/* Search Box */
.search-box {
    position: relative;
    margin-right: 1rem;
}

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.pagination-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
}

.pagination-btn:hover:not(:disabled) {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-btn.active {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
}

/* Responsive Tables */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    /* Removed min-width to allow better responsiveness */
}

/* Welcome Card for account manager */
.welcome-card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.welcome-card h2 {
    margin-bottom: 1rem;
    color: var(--accent-blue);
}

.welcome-card p {
    color: var(--text-muted);
}

/* Chart container tweak */
.chart-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Select2 FINAL FIX - High Contrast & Forced Dark Theme */
.select2-container--default .select2-dropdown,
.select2-dropdown {
    background-color: #232730 !important;
    border: 1px solid #3b4252 !important;
    border-radius: 12px !important;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5) !important;
    overflow: hidden !important;
    z-index: 9999 !important;
}

.select2-container--default .select2-results__options,
.select2-results__options {
    background-color: #232730 !important;
    color: #ffffff !important;
}

.select2-results__option {
    background-color: #232730 !important;
    color: #e5e9f0 !important;
    padding: 10px 15px !important;
}

.select2-container--default .select2-results__option--highlighted[aria-selected],
.select2-results__option--highlighted {
    background-color: #3b82f6 !important;
    color: #ffffff !important;
}

.select2-container--default .select2-results__option--selected,
.select2-results__option--selected {
    background-color: rgba(59, 130, 246, 0.2) !important;
    color: #3b82f6 !important;
    font-weight: 700 !important;
}

.select2-container--default .select2-search--dropdown,
.select2-search--dropdown {
    background-color: #232730 !important;
    padding: 10px !important;
}

.select2-container--default .select2-search--dropdown .select2-search__field,
.select2-search--dropdown .select2-search__field {
    background-color: #0f1115 !important;
    border: 1px solid #3b4252 !important;
    color: #ffffff !important;
    border-radius: 6px !important;
    padding: 8px 12px !important;
}

.select2-selection--single {
    background-color: #0f1115 !important;
    border: 1px solid #2e3440 !important;
    border-radius: 8px !important;
    height: 42px !important;
    display: flex !important;
    align-items: center !important;
}

.select2-selection--single .select2-selection__rendered {
    color: #ffffff !important;
    padding-left: 12px !important;
}

.select2-results__option[id*="ADD_NEW"] {
    color: #3b82f6 !important;
    font-weight: 700 !important;
    border-top: 1px solid #2e3440 !important;
    margin-top: 5px !important;
}

/* Restructured Dashboard Grid */
.dashboard-grid-2x2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.dashboard-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
}

.dashboard-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-color);
}

@media (max-width: 1024px) {
    .dashboard-grid-2x2 {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Collapsible Sidebar & Modern Responsiveness
   ========================================== */

/* Toggle Button styling */
.sidebar-toggle {
    position: absolute;
    right: -12px;
    top: 23px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 100;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    padding: 0;
}

.sidebar-toggle:hover {
    color: var(--accent-blue);
    border-color: var(--accent-blue);
    background-color: var(--bg-card);
}

.sidebar-toggle svg {
    transition: transform 0.2s ease;
}

/* Sidebar collapsed state rules */
#app-container.sidebar-collapsed .sidebar {
    width: 70px;
}

#app-container.sidebar-collapsed .logo-container {
    padding: 0 0.8rem 2rem;
    justify-content: center;
    gap: 0;
}

#app-container.sidebar-collapsed .logo-container h2 {
    display: none;
}

#app-container.sidebar-collapsed .nav-menu {
    padding: 0 0.5rem;
}

#app-container.sidebar-collapsed .nav-item {
    justify-content: center;
    padding: 0.75rem 0;
    gap: 0;
}

#app-container.sidebar-collapsed .nav-item span {
    display: none;
}

#app-container.sidebar-collapsed .user-profile {
    justify-content: center;
    padding: 1rem 0;
}

#app-container.sidebar-collapsed .user-info {
    display: none;
}

#app-container.sidebar-collapsed #btn-restore-sa span {
    display: none;
}

#app-container.sidebar-collapsed #btn-restore-sa {
    padding: 0.5rem 0;
    display: flex;
    justify-content: center;
}

#app-container.sidebar-collapsed #btn-logout span {
    display: none;
}

#app-container.sidebar-collapsed #btn-logout {
    padding: 0.5rem 0;
    display: flex;
    justify-content: center;
}

#app-container.sidebar-collapsed #btn-logout svg {
    margin-right: 0 !important;
}

#app-container.sidebar-collapsed .sidebar-toggle svg {
    transform: rotate(180deg);
}

/* Optimize Horizontal Space and Responsiveness */
@media (max-width: 1400px) {
    .main-content {
        padding: 2rem 1.5rem;
    }
}

@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 1rem;
    }
    
    .dashboard-grid-2x2 {
        gap: 1.25rem;
    }
}

@media (max-width: 992px) {
    .top-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
        margin-bottom: 1.5rem;
    }
    
    .header-actions {
        width: 100%;
        flex-wrap: wrap;
        justify-content: flex-start;
        gap: 0.75rem;
    }
    
    .search-box {
        flex: 1;
        min-width: 200px;
        margin-right: 0 !important;
    }
    
    .search-box input {
        width: 100% !important;
    }
}

@media (max-width: 768px) {
    html, body {
        overflow: auto;
        height: auto;
    }
    
    #app-container {
        flex-direction: column;
        height: auto;
        overflow: visible;
    }
    
    .sidebar {
        width: 100% !important;
        height: auto;
        padding: 1rem 0;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        position: static !important;
    }
    
    #app-container.sidebar-collapsed .sidebar {
        width: 100% !important;
    }
    
    .sidebar-toggle {
        display: none; /* Hide toggle button on mobile */
    }
    
    .logo-container {
        padding: 0 1.5rem 1rem;
    }
    
    .nav-menu {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.25rem;
        padding: 0 1rem;
    }
    
    .nav-item {
        padding: 0.5rem 0.75rem;
        gap: 0.5rem;
        font-size: 0.85rem;
    }
    
    #app-container.sidebar-collapsed .nav-item span {
        display: inline; /* Keep text visible on mobile screen */
    }
    
    .user-profile {
        border-top: none;
        margin-top: 0;
        padding: 0.5rem 1.5rem;
    }
    
    .main-content {
        padding: 1rem;
        overflow-y: visible;
    }
}