/* =============================================================================
   CALCULADORA FINANCIERA - SISTEMA CPQ
   Basado en la estética del Banco INV (Verde institucional)
   ============================================================================= */

/* --- Variables CSS --- */
:root {
    /* Colores principales (Verde institucional) */
    --color-primary: #2D5F2D;
    --color-primary-dark: #1F4020;
    --color-primary-light: #3C7A3C;
    --color-primary-lighter: #E8F5E8;
    
    /* Colores secundarios */
    --color-secondary: #4A7C59;
    --color-accent: #5FA573;
    
    /* Colores neutros */
    --color-white: #FFFFFF;
    --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;
    
    /* Colores de estado */
    --color-success: #10B981;
    --color-info: #3B82F6;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    
    /* Tipografía */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 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: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    
    /* Bordes */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transiciones */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* --- Reset y Base --- */
* {
    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);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Container Principal --- */
.calculadora-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* --- Header de Calculadora --- */
.calculadora-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.calculadora-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.calculadora-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    font-weight: 400;
}

/* --- Tabs --- */
.tabs-container {
    margin-bottom: var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    border-bottom: 2px solid var(--color-primary);
}

.tab-button {
    flex: 1;
    min-width: 120px;
    padding: var(--spacing-md) var(--spacing-sm);
    background: var(--color-white);
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-600);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tab-button:hover {
    background: var(--color-primary-lighter);
    color: var(--color-primary);
}

.tab-button.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-bottom-color: var(--color-primary-dark);
}

.tab-button.active:hover {
    background: var(--color-primary-dark);
}

.tab-icon {
    display: none; /* Ocultar iconos para diseño profesional */
}

.tab-label {
    font-size: var(--font-size-base);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* --- Contenido de Tabs --- */
.tabs-content {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.tab-content {
    display: none;
    animation: fadeIn var(--transition-base);
}

.tab-content.active {
    display: block;
}

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

/* --- Formulario --- */
.calculator-form {
    max-width: 700px;
    margin: 0 auto;
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    border-bottom: 2px solid var(--color-primary-lighter);
    padding-bottom: var(--spacing-sm);
}

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

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

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

.required {
    color: var(--color-error);
    font-weight: 700;
}

.optional {
    color: var(--color-gray-400);
    font-weight: 500;
    font-size: var(--font-size-xs);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-prefix {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-weight: 600;
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    pointer-events: none;
    z-index: 10;
    line-height: 1;
}

input[type="number"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.input-wrapper input[type="number"] {
    padding-left: 2.75rem;
}

.form-group:not(.input-wrapper) input[type="number"] {
    padding-left: var(--spacing-md);
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-lighter);
}

input[type="number"]::placeholder {
    color: var(--color-gray-400);
}

.help-text {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    font-style: italic;
}

/* --- Info Box --- */
.info-box {
    background: var(--color-primary-lighter);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    margin: var(--spacing-lg) 0;
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.info-icon {
    display: none; /* Ocultar iconos para diseño profesional */
}

.info-box p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    line-height: 1.6;
}

.info-box strong {
    color: var(--color-primary);
    font-weight: 700;
}

/* --- Botones --- */
.btn-calcular,
.btn-solicitar {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-white);
    background: var(--color-primary);
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

.btn-solicitar {
    background: var(--color-secondary);
    margin-top: var(--spacing-xl);
}

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

.btn-icon {
    display: none; /* Ocultar iconos para diseño profesional */
}

/* --- Resultados --- */
.resultado-container {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-gray-50);
    border: 2px solid var(--color-primary-lighter);
    border-radius: var(--border-radius-lg);
    animation: slideDown var(--transition-base);
}

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

.resultado-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.resultado-grid {
    display: grid;
    gap: var(--spacing-sm);
}

.resultado-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--border-radius-md);
    border-left: 3px solid var(--color-gray-300);
    transition: all var(--transition-fast);
}

.resultado-item:hover {
    border-left-color: var(--color-primary);
    transform: translateX(4px);
}

.resultado-item.destacado {
    background: var(--color-primary-lighter);
    border-left-color: var(--color-primary);
    border-left-width: 4px;
}

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

.resultado-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-gray-800);
}

.resultado-value.total {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
}

.cta-container {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px dashed var(--color-gray-300);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .calculadora-container {
        padding: var(--spacing-md);
    }
    
    .calculadora-title {
        font-size: var(--font-size-2xl);
    }
    
    .calculadora-subtitle {
        font-size: var(--font-size-base);
    }
    
    .tabs {
        flex-direction: row;
        overflow-x: auto;
    }
    
    .tab-button {
        min-width: 120px;
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-sm);
        padding: var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .tabs-content {
        padding: var(--spacing-lg);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .resultado-container {
        padding: var(--spacing-lg);
    }
    
    .resultado-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .resultado-value.total {
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 480px) {
    .calculadora-title {
        font-size: var(--font-size-xl);
    }
    
    .tab-button {
        min-width: 100px;
        font-size: var(--font-size-xs);
        padding: var(--spacing-sm) var(--spacing-xs);
    }
    
    .btn-calcular,
    .btn-solicitar {
        font-size: var(--font-size-base);
        padding: var(--spacing-md);
    }
}

/* --- Print Styles --- */
@media print {
    .tabs-container,
    .btn-calcular,
    .btn-solicitar,
    .cta-container {
        display: none;
    }
    
    .tab-content {
        display: block !important;
    }
    
    .calculadora-container {
        max-width: 100%;
    }
}

/* --- Accesibilidad --- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible para navegación con teclado */
*:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* --- Estados de carga --- */
.loading {
    pointer-events: none;
    opacity: 0.6;
    cursor: wait;
}

.loading::after {
    content: "...";
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: ".";
    }
    40% {
        content: "..";
    }
    60%, 100% {
        content: "...";
    }
}