/* ================================================
   Variables y Reset
   ================================================ */
:root {
    /* Colores corporativos */
    --color-primary: #004b8d;
    --color-primary-dark: #003366;
    --color-secondary: #f5f6f7;
    --color-success: #2ecc71;
    --color-warning: #f39c12;
    --color-danger: #e74c3c;
    --color-info: #3498db;
    
    /* Grises */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Tipografía */
    --font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Dimensiones */
    --header-height: 64px;
    --sidebar-width: 240px;
    --footer-height: 48px;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    overflow-x: hidden;
}

/* ================================================
   Header
   ================================================ */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
}

.header-left .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.header-left .logo i {
    font-size: 1.5rem;
}

.header-center .period-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.header-center select {
    background: transparent;
    border: none;
    color: white;
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    outline: none;
    padding: var(--spacing-xs) var(--spacing-sm);
}

.header-center select option {
    background: var(--color-primary);
    color: white;
}

.header-right .user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: background 0.2s;
}

.header-right .user-info:hover {
    background: rgba(255, 255, 255, 0.1);
}

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

/* ================================================
   Layout Container
   ================================================ */
.app-container {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height) - var(--footer-height));
}

/* ================================================
   Sidebar
   ================================================ */
.sidebar {
    position: fixed;
    left: 0;
    top: var(--header-height);
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height) - var(--footer-height));
    background: white;
    border-right: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
    overflow-y: auto;
}

.nav-menu {
    padding: var(--spacing-lg) 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-gray-600);
    text-decoration: none;
    transition: all 0.2s;
    position: relative;
    font-weight: 500;
}

.nav-item i {
    font-size: var(--font-size-lg);
    width: 24px;
    text-align: center;
}

.nav-item:hover {
    background: var(--color-gray-50);
    color: var(--color-primary);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(0, 75, 141, 0.1) 0%, rgba(0, 75, 141, 0) 100%);
    color: var(--color-primary);
    font-weight: 600;
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--color-primary);
    border-radius: 0 4px 4px 0;
}

/* ================================================
   Main Content
   ================================================ */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: var(--spacing-xl);
    background: var(--color-gray-50);
}

.screen {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.screen.active {
    display: block;
}

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

.screen-header {
    margin-bottom: var(--spacing-xl);
}

.screen-header h1 {
    font-size: var(--font-size-3xl);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.screen-header h1 i {
    color: var(--color-primary);
}

.subtitle {
    color: var(--color-gray-500);
    font-size: var(--font-size-lg);
}

/* ================================================
   Filters Bar
   ================================================ */
.filters-bar {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-end;
    margin-bottom: var(--spacing-xl);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
}

.filter-group label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
}

.filter-group select,
.filter-group input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background: white;
    transition: all 0.2s;
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 75, 141, 0.1);
}

/* ================================================
   KPI Cards
   ================================================ */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.kpi-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.kpi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.kpi-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.kpi-content {
    flex: 1;
}

.kpi-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.kpi-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    font-weight: 500;
}

/* ================================================
   Charts
   ================================================ */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.chart-container {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
}

.chart-container h3 {
    font-size: var(--font-size-xl);
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.chart-container h3 i {
    color: var(--color-primary);
}

/* ================================================
   Tables
   ================================================ */
.table-container {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

.table-container h3 {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-gray-200);
    font-size: var(--font-size-xl);
    color: var(--color-gray-800);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--color-gray-100);
}

.data-table th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
    font-size: var(--font-size-sm);
}

.data-table tbody tr {
    transition: background 0.2s;
}

.data-table tbody tr:hover {
    background: var(--color-gray-50);
}

/* ================================================
   Status Chips & Badges
   ================================================ */
.status-chip {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-chip.pendiente {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

.status-chip.encurso {
    background: #fef3c7;
    color: #92400e;
}

.status-chip.acordado {
    background: #d1fae5;
    color: #065f46;
}

.status-chip.cerrado {
    background: #dbeafe;
    color: #1e40af;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    margin-right: var(--spacing-sm);
}

.status-indicator.controlado {
    background: var(--color-success);
}

.status-indicator.revision {
    background: var(--color-warning);
}

.status-indicator.retrasado {
    background: var(--color-danger);
}

.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.badge-reunion {
    background: #e0e7ff;
    color: #3730a3;
}

.badge-llamada {
    background: #fce7f3;
    color: #831843;
}

.badge-correo {
    background: #ccfbf1;
    color: #134e4a;
}

.badge-propuesta {
    background: #fef3c7;
    color: #78350f;
}

/* ================================================
   Buttons
   ================================================ */
.btn-primary,
.btn-secondary,
.btn-back,
.btn-icon {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.btn-secondary:hover {
    background: var(--color-gray-200);
}

.btn-back {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-md);
}

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

.btn-icon {
    padding: var(--spacing-sm);
    background: transparent;
    color: var(--color-primary);
}

.btn-icon:hover {
    background: var(--color-gray-100);
}

/* ================================================
   Action Bar
   ================================================ */
.action-bar {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    justify-content: flex-end;
}

/* ================================================
   Mini KPIs (Detalle Grupo)
   ================================================ */
.mini-kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.mini-kpi {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.mini-kpi i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.mini-kpi-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.mini-kpi-label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ================================================
   Tabs
   ================================================ */
.tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--color-gray-200);
}

.tab {
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--color-gray-600);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tab:hover {
    color: var(--color-primary);
    background: var(--color-gray-50);
}

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

/* ================================================
   Form Card
   ================================================ */
.form-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.form-card h3 {
    font-size: var(--font-size-xl);
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-card h4 {
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-field label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
}

.form-field input,
.form-field select,
.form-field textarea {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all 0.2s;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 75, 141, 0.1);
}

.form-field input[readonly] {
    background: var(--color-gray-50);
    color: var(--color-gray-600);
}

.form-field .highlight-value {
    font-weight: 700;
    color: var(--color-primary);
}

.form-field .highlight-warning {
    font-weight: 700;
    color: var(--color-warning);
}

/* ================================================
   Timeline
   ================================================ */
.timeline {
    position: relative;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-gray-200);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.timeline-dot {
    position: absolute;
    left: 0;
    top: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-gray-300);
    border: 4px solid white;
    box-shadow: 0 0 0 2px var(--color-gray-300);
}

.timeline-dot.active {
    background: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-dot.pending {
    background: white;
    box-shadow: 0 0 0 2px var(--color-gray-300);
}

.timeline-date {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xs);
}

.timeline-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-xs);
}

.timeline-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* ================================================
   User Badge
   ================================================ */
.user-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    width: fit-content;
}

.user-avatar-small {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-success);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: var(--font-size-xs);
}

/* ================================================
   Alerts Section
   ================================================ */
.alerts-section {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.alerts-section h3 {
    font-size: var(--font-size-xl);
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.alerts-section h3 i {
    color: var(--color-warning);
}

.alert-icon {
    font-size: var(--font-size-lg);
}

.alert-icon.high {
    color: var(--color-danger);
}

.alert-icon.medium {
    color: var(--color-warning);
}

/* ================================================
   Dashboard Split Layout
   ================================================ */
.dashboard-split {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--spacing-xl);
}

.dashboard-main {
    min-width: 0;
}

.dashboard-sidebar {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.dashboard-sidebar h3 {
    font-size: var(--font-size-lg);
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.stats-summary {
    margin-top: var(--spacing-xl);
}

.stat-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.stat-item:last-child {
    border-bottom: none;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

/* ================================================
   Modal
   ================================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.show {
    display: flex;
    animation: fadeIn 0.2s ease-in-out;
}

.modal-content {
    background: white;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease-in-out;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-gray-900);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--color-gray-400);
    font-size: var(--font-size-xl);
    cursor: pointer;
    transition: color 0.2s;
    padding: var(--spacing-sm);
}

.modal-close:hover {
    color: var(--color-gray-700);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.required {
    color: var(--color-danger);
}

.field-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-top: var(--spacing-xs);
}

.campos-condicionales {
    margin-top: var(--spacing-lg);
}

.form-separator {
    height: 1px;
    background: var(--color-gray-200);
    margin: var(--spacing-lg) 0;
}

.calculated-field {
    background: var(--color-gray-50) !important;
    font-weight: 700;
    color: var(--color-success) !important;
}

/* ================================================
   Footer
   ================================================ */
.app-footer {
    position: fixed;
    bottom: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--footer-height);
    background: white;
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 900;
}

.footer-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ================================================
   Toast Notification
   ================================================ */
.toast {
    position: fixed;
    top: calc(var(--header-height) + var(--spacing-lg));
    right: var(--spacing-lg);
    background: var(--color-gray-900);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 3000;
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    animation: slideInRight 0.3s ease-in-out;
}

.toast.show {
    display: flex;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ================================================
   Placeholder Content
   ================================================ */
.placeholder-content {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.placeholder-content i {
    font-size: 4rem;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-lg);
}

.placeholder-content h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-sm);
}

.placeholder-content p {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xl);
}

/* ================================================
   Responsive Design
   ================================================ */
@media (max-width: 1200px) {
    .dashboard-split {
        grid-template-columns: 1fr;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .app-footer {
        left: 0;
    }
    
    .kpi-grid {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .filters-bar {
        flex-direction: column;
    }
}

@media print {
    .app-header,
    .sidebar,
    .app-footer,
    .action-bar,
    .filters-bar {
        display: none;
    }
    
    .main-content {
        margin: 0;
        padding: 0;
    }
}