/* ============================================================================
   SISTEMA DE DISEÑO UNIFICADO - COGNITIVA
   Elegancia + Sofisticación + Facilidad de Uso
   ============================================================================ */

:root {
    /* Colores Principales */
    --primary: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #81C784;
    --secondary: #667eea;
    --accent: #FF9800;
    
    /* Estados */
    --success: #4CAF50;
    --warning: #FF9800;
    --error: #f44336;
    --info: #2196F3;
    
    /* Grises */
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* Sombras */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.18);
    
    /* Bordes */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-full: 9999px;
    
    /* Espaciado */
    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ============================================================================
   RESET Y BASE
   ============================================================================ */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--gray-900);
    background: linear-gradient(135deg, #f5f7fa 0%, #e8f5e9 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   TIPOGRAFÍA
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p { margin-bottom: var(--space-md); }

/* ============================================================================
   BOTONES - Tamaño táctil mínimo 44px
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 44px;
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

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

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.btn-secondary {
    background: var(--gray-600);
    color: white;
}

.btn-secondary:hover {
    background: #ff9800db !important;
    color: white;
}

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

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

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

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

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
    min-height: 52px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
    min-height: 36px;
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-full);
}

/* ============================================================================
   TARJETAS
   ============================================================================ */

.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-200);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-interactive {
    cursor: pointer;
}

.card-interactive:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.card-header {
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--gray-100);
    margin-bottom: var(--space-lg);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.card-body {
    padding: var(--space-lg) 0;
}

.card-footer {
    padding-top: var(--space-lg);
    border-top: 2px solid var(--gray-100);
    margin-top: var(--space-lg);
}

/* ============================================================================
   FORMULARIOS - Tamaño táctil 48px
   ============================================================================ */

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
    font-size: 15px;
    color: var(--gray-700);
}

.form-label-required::after {
    content: '*';
    color: var(--error);
    margin-left: 4px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    font-family: inherit;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    min-height: 48px;
    background: white;
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
    border-color: var(--gray-400);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    color: var(--error);
    font-size: 13px;
    margin-top: var(--space-xs);
    display: flex;
    align-items: center;
    gap: 4px;
}

.form-help {
    color: var(--gray-600);
    font-size: 13px;
    margin-top: var(--space-xs);
}

.form-input.error,
.form-textarea.error,
.form-select.error {
    border-color: var(--error);
}

.form-check-input[type=checkbox] {
    border-color: black;
}

/* ============================================================================
   BADGES Y ETIQUETAS
   ============================================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary { background: var(--primary); color: white; }
.badge-secondary { background: var(--secondary); color: white; }
.badge-success { background: var(--success); color: white; }
.badge-warning { background: var(--warning); color: white; }
.badge-danger { background: var(--error); color: white; }
.badge-info { background: var(--info); color: white; }
.badge-light { background: var(--gray-200); color: var(--gray-900); }

/* ============================================================================
   MODALES
   ============================================================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    padding: var(--space-lg);
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-overlay .modal {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn var(--transition-slow);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-overlay .modal-header {
    padding: var(--space-xl);
    border-bottom: 2px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-overlay .modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.modal-close {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 20px;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--gray-200);
    transform: rotate(90deg);
}

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

.modal-overlay .modal-footer {
    padding: var(--space-xl);
    border-top: 2px solid var(--gray-100);
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
}

/* Fix Bootstrap modal-footer flex-wrap */
.modal-footer {
    flex-wrap: nowrap !important;
}

/* ============================================================================
   TABS
   ============================================================================ */

.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: var(--space-xl);
    overflow-x: auto;
}

.tab {
    padding: var(--space-md) var(--space-lg);
    font-weight: 500;
    color: var(--gray-600);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 44px;
    white-space: nowrap;
}

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

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: var(--gray-50);
}

/* ============================================================================
   TABLAS
   ============================================================================ */

.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

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

.table thead {
    background: var(--gray-50);
}

.table th {
    padding: var(--space-md);
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    border-bottom: 2px solid var(--gray-200);
}

.table td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
}

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

/* ============================================================================
   ALERTAS
   ============================================================================ */

.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.alert-success {
    background: #e8f5e9;
    color: #2e7d32;
    border-left: 4px solid var(--success);
}

.alert-warning {
    background: #fff3e0;
    color: #e65100;
    border-left: 4px solid var(--warning);
}

.alert-error {
    background: #ffebee;
    color: #c62828;
    border-left: 4px solid var(--error);
}

.alert-info {
    background: #e3f2fd;
    color: #1565c0;
    border-left: 4px solid var(--info);
}

/* ============================================================================
   TOAST NOTIFICATIONS
   ============================================================================ */

#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    min-width: 300px;
    max-width: 500px;
    padding: 16px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
    border-left: 4px solid;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-success {
    background: #d4edda;
    border-left-color: #28a745;
}

.toast-error {
    background: #f8d7da;
    border-left-color: #dc3545;
}

.toast-warning {
    background: #fff3cd;
    border-left-color: #ffc107;
}

.toast-info {
    background: #d1ecf1;
    border-left-color: #17a2b8;
}

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
    font-size: 14px;
}

.toast-success .toast-icon {
    background: #28a745;
    color: white;
}

.toast-error .toast-icon {
    background: #dc3545;
    color: white;
}

.toast-warning .toast-icon {
    background: #ffc107;
    color: #333;
}

.toast-info .toast-icon {
    background: #17a2b8;
    color: white;
}

.toast-message {
    flex: 1;
    color: #333;
    font-size: 14px;
    line-height: 1.5;
}

.toast-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: color 0.2s;
}

.toast-close:hover {
    color: #333;
}

/* ============================================================================
   GRID Y LAYOUT
   ============================================================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--space-lg);
}

.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ============================================================================
   UTILIDADES
   ============================================================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }
.text-muted { color: var(--gray-600); }

.bg-primary { background: var(--primary); }
.bg-light { background: var(--gray-50); }
.bg-white { background: white; }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* ============================================================================
   LOADING Y SPINNERS
   ============================================================================ */

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
}

/* ============================================================================
   ACCESIBILIDAD
   ============================================================================ */

*:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    :root {
        --space-xl: 24px;
        --space-2xl: 32px;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .card {
        padding: var(--space-lg);
    }
    
    .modal {
        max-width: 100%;
        margin: var(--space-md);
    }
    
    #toast-container {
        left: var(--space-md);
        right: var(--space-md);
    }
    
    .toast {
        min-width: auto;
    }
}

/* ============================================================================
   ANIMACIONES
   ============================================================================ */

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

.animate-fade-in-up {
    animation: fadeInUp var(--transition-base);
}

/* ============================================================================
   DARK MODE READY (Preparado para futuro)
   ============================================================================ */

@media (prefers-color-scheme: dark) {
    /* Implementar en futuro si se requiere */
}