/**
 * ==========================================================================
 * QUICK BOOKING CSS PROFESIONAL - DISEÑO ELEGANTE
 * ==========================================================================
 * 
 * Diseño inspirado en plataformas premium como Booking.com, Airbnb
 * Layout sofisticado con tipografía, colores y sombras profesionales
 * VERSIÓN 1.4.0 - PRECIO EXTERNO LIMPIO
 */

/* ==========================================================================
   VARIABLES CSS PROFESIONALES
   ========================================================================== */

.bagsgo-search-box {
    /* Paleta de colores profesional */
    --primary-color: #FF6B35;
    --primary-hover: #E55A2B;
    --primary-light: #FFE8E1;
    --secondary-color: #2563EB;
    --secondary-hover: #1D4ED8;
    
    /* Grises sofisticados */
    --gray-50: #FAFBFC;
    --gray-100: #F4F6F8;
    --gray-200: #E4E7EC;
    --gray-300: #D0D5DD;
    --gray-400: #98A2B3;
    --gray-500: #667085;
    --gray-600: #475467;
    --gray-700: #344054;
    --gray-800: #1D2939;
    --gray-900: #101828;
    --white: #FFFFFF;
    
    /* Espaciado profesional */
    --spacing-xs: 0.375rem;   /* 6px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 0.75rem;    /* 12px */
    --spacing-lg: 1rem;       /* 16px */
    --spacing-xl: 1.25rem;    /* 20px */
    --spacing-2xl: 1.5rem;    /* 24px */
    --spacing-3xl: 2rem;      /* 32px */
    
    /* Borders y sombras elegantes */
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    --border-color: var(--gray-200);
    --border-focus: var(--primary-color);
    
    /* Sombras profesionales */
    --shadow-xs: 0 1px 2px 0 rgba(16, 24, 40, 0.06);
    --shadow-sm: 0 1px 3px 0 rgba(16, 24, 40, 0.1), 0 1px 2px 0 rgba(16, 24, 40, 0.06);
    --shadow-md: 0 4px 8px -2px rgba(16, 24, 40, 0.1), 0 2px 4px -2px rgba(16, 24, 40, 0.06);
    --shadow-lg: 0 12px 16px -4px rgba(16, 24, 40, 0.08), 0 4px 6px -2px rgba(16, 24, 40, 0.03);
    --shadow-xl: 0 20px 24px -4px rgba(16, 24, 40, 0.08), 0 8px 8px -4px rgba(16, 24, 40, 0.03);
    
    /* Typography elegante */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-size-xs: 0.75rem;   /* 12px */
    --font-size-sm: 0.875rem;  /* 14px */
    --font-size-base: 1rem;    /* 16px */
    --font-size-lg: 1.125rem;  /* 18px */
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    
    /* Transiciones suaves */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ==========================================================================
   CONTENEDOR PRINCIPAL ELEGANTE
   ========================================================================== */

.bagsgo-search-box {
    font-family: var(--font-family);
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-3xl);
    box-shadow: var(--shadow-xl);
    max-width: 100%;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Efecto de gradiente sutil en el borde superior */
.bagsgo-search-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0;
}

/* ==========================================================================
   LAYOUT RESPONSIVO PROFESIONAL
   ========================================================================== */

.quick-form-horizontal {
    display: grid;
    grid-template-columns: 1.2fr 1.2fr 140px 140px 100px 160px;
    gap: var(--spacing-lg);
    align-items: end;
}

/* Responsive breakpoints mejorados */
@media (min-width: 1400px) {
    .quick-form-horizontal {
        grid-template-columns: 1fr 1fr 160px 160px 120px 180px;
        gap: var(--spacing-xl);
    }
    
    .bagsgo-search-box {
        padding: var(--spacing-3xl) var(--spacing-3xl);
    }
}

@media (max-width: 1200px) {
    .quick-form-horizontal {
        grid-template-columns: 1fr 1fr 130px 130px 80px 140px;
        gap: var(--spacing-md);
    }
}

@media (max-width: 1024px) {
    .bagsgo-search-box {
        padding: var(--spacing-2xl);
    }
    
    .quick-form-horizontal {
        grid-template-columns: 1fr 1fr 1fr;
        gap: var(--spacing-lg);
    }
    
    .form-field:nth-child(4) {
        grid-column: span 1;
    }
    
    .form-field-narrow {
        grid-column: span 1;
    }
    
    .form-field-button {
        grid-column: span 3;
        margin-top: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .quick-form-horizontal {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
    
    .form-field:nth-child(3),
    .form-field:nth-child(4) {
        grid-column: span 1;
    }
    
    .form-field-narrow {
        grid-column: span 1;
    }
    
    .form-field-button {
        grid-column: span 2;
        margin-top: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .bagsgo-search-box {
        padding: var(--spacing-xl);
        border-radius: var(--border-radius-lg);
    }
    
    .quick-form-horizontal {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .form-field,
    .form-field-narrow,
    .form-field-button {
        grid-column: span 1;
    }
    
    .form-field-button {
        margin-top: var(--spacing-xl);
    }
}

/* ==========================================================================
   CAMPOS DEL FORMULARIO ELEGANTES
   ========================================================================== */

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

.form-field-narrow {
    min-width: 80px;
}

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

/* ==========================================================================
   LABELS SOFISTICADOS CON ICONOS
   ========================================================================== */

.field-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--gray-700);
    margin-bottom: var(--spacing-xs);
    line-height: var(--line-height-tight);
    text-transform: none;
    letter-spacing: -0.01em;
}

.field-icon {
    width: 16px;
    height: 16px;
    color: var(--gray-500);
    flex-shrink: 0;
    stroke-width: 2;
}

/* ==========================================================================
   INPUTS Y SELECTS PROFESIONALES
   ========================================================================== */

.form-input,
.form-select {
    width: 100%;
    height: 48px;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--gray-800);
    background: var(--white);
    transition: all var(--transition-normal);
    box-sizing: border-box;
    outline: none;
    box-shadow: var(--shadow-xs);
}

.form-input:hover,
.form-select:hover {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-sm);
}

.form-input:focus,
.form-select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 4px var(--primary-light), var(--shadow-sm);
    background: var(--white);
}

/* Select styling mejorado */
.form-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23667085' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 44px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.form-select:focus {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23FF6B35' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
}

/* ==========================================================================
   LUGGAGE COUNTER INTEGRADO Y MINIMALISTA
   ========================================================================== */

.luggage-counter {
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--border-radius);
    overflow: visible;
    transition: all var(--transition-normal);
    height: 48px;
    gap: var(--spacing-xs);
}

.btn-luggage-minus,
.btn-luggage-plus {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--gray-100);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--gray-600);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
    -webkit-user-select: none;
    box-shadow: var(--shadow-xs);
}

.btn-luggage-minus:hover:not(:disabled),
.btn-luggage-plus:hover:not(:disabled) {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    transform: scale(1.1);
    box-shadow: var(--shadow-sm);
}

.btn-luggage-minus:active:not(:disabled),
.btn-luggage-plus:active:not(:disabled) {
    transform: scale(0.95);
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-luggage-minus:disabled,
.btn-luggage-plus:disabled {
    background: var(--gray-50);
    color: var(--gray-300);
    border-color: var(--gray-200);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.luggage-count-display {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 48px;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--gray-800);
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    letter-spacing: -0.02em;
    box-shadow: var(--shadow-xs);
    transition: all var(--transition-normal);
}

.luggage-counter:hover .luggage-count-display {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-sm);
}

/* Responsive adjustments para el counter */
@media (max-width: 480px) {
    .luggage-counter {
        height: 44px;
        gap: var(--spacing-xs);
    }
    
    .btn-luggage-minus,
    .btn-luggage-plus {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
    
    .luggage-count-display {
        min-width: 44px;
        height: 44px;
        font-size: var(--font-size-lg);
    }
}

/* Date input styling */
.form-input[type="date"] {
    position: relative;
    padding-right: 44px;
}

.form-input[type="date"]::-webkit-calendar-picker-indicator {
    position: absolute;
    right: 12px;
    color: var(--gray-500);
    cursor: pointer;
    font-size: 16px;
}

/* Placeholder styling elegante */
.form-input::placeholder {
    color: var(--gray-400);
    font-weight: var(--font-weight-medium);
    font-style: normal;
}

/* ==========================================================================
   PRECIO DINÁMICO EXTERNO - SIMPLE Y ELEGANTE
   ========================================================================== */

.price-estimator {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    min-height: 24px;
    padding: 0 var(--spacing-xs);
}

.price-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--gray-600);
    line-height: 1;
}

.price-value {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    letter-spacing: -0.02em;
    line-height: 1;
    min-width: 40px;
    text-align: right;
    
    /* Transición suave solo del contenido */
    transition: color 0.2s ease;
}

/* Estados del precio */
.price-value.calculating {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.price-value.error {
    color: #F04438;
    font-size: var(--font-size-sm);
}

.price-value.success {
    color: var(--primary-color);
}

/* Animación sutil de actualización */
.price-value.updated {
    animation: priceUpdate 0.3s ease;
}

@keyframes priceUpdate {
    0% { 
        transform: scale(1);
        color: var(--primary-color);
    }
    50% { 
        transform: scale(1.05);
        color: var(--primary-hover);
    }
    100% { 
        transform: scale(1);
        color: var(--primary-color);
    }
}

/* Responsive del precio */
@media (max-width: 768px) {
    .price-estimator {
        justify-content: center;
        margin-bottom: var(--spacing-lg);
    }
    
    .price-label {
        font-size: var(--font-size-xs);
    }
    
    .price-value {
        font-size: var(--font-size-base);
        min-width: 35px;
    }
}

@media (max-width: 480px) {
    .price-estimator {
        margin-bottom: var(--spacing-xl);
    }
}

/* ==========================================================================
   BOTÓN CTA PROFESIONAL - SIMPLIFICADO
   ========================================================================== */

.quick-submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    height: 48px;
    width: 100%;
    padding: 0 var(--spacing-2xl);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
}

.quick-submit-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-color) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.quick-submit-btn:hover::before {
    opacity: 1;
}

.quick-submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.quick-submit-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.quick-submit-btn:disabled {
    background: var(--gray-300);
    color: var(--gray-500);
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-xs);
}

.quick-submit-btn:disabled::before {
    display: none;
}

.btn-icon {
    flex-shrink: 0;
    z-index: 1;
    position: relative;
    width: 18px;
    height: 18px;
}

.btn-text {
    line-height: 1;
    z-index: 1;
    position: relative;
}

/* Loading state elegante */
.quick-submit-btn.loading {
    color: transparent;
    pointer-events: none;
}

.quick-submit-btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive del botón */
@media (max-width: 480px) {
    .quick-submit-btn {
        height: 44px;
        font-size: var(--font-size-sm);
    }
    
    .btn-icon {
        width: 16px;
        height: 16px;
    }
}

/* ==========================================================================
   ESTADOS DE ERROR Y VALIDACIÓN ELEGANTES
   ========================================================================== */

.form-field.error .form-input,
.form-field.error .form-select {
    border-color: #F04438;
    background: #FEF3F2;
    box-shadow: 0 0 0 4px #FEE4E2, var(--shadow-xs);
}

.form-field.success .form-input,
.form-field.success .form-select {
    border-color: #12B76A;
    background: #F6FEF9;
    box-shadow: 0 0 0 4px #ECFDF3, var(--shadow-xs);
}

.error-message {
    color: #F04438;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    margin-top: var(--spacing-xs);
    display: none;
    line-height: var(--line-height-tight);
}

.form-field.error .error-message {
    display: block;
    animation: slideDown var(--transition-fast);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   MEJORAS DE ACCESIBILIDAD PROFESIONALES
   ========================================================================== */

.form-input:focus-visible,
.form-select:focus-visible,
.quick-submit-btn:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

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

.bagsgo-search-box {
    animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(32px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.form-field {
    animation: fadeIn 0.4s ease-out;
    animation-fill-mode: both;
}

.form-field:nth-child(1) { animation-delay: 0.1s; }
.form-field:nth-child(2) { animation-delay: 0.15s; }
.form-field:nth-child(3) { animation-delay: 0.2s; }
.form-field:nth-child(4) { animation-delay: 0.25s; }
.form-field:nth-child(5) { animation-delay: 0.3s; }
.form-field:nth-child(6) { animation-delay: 0.35s; }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   MICRO-INTERACCIONES
   ========================================================================== */

.form-input:not(:placeholder-shown),
.form-select:not([value=""]) {
    background: var(--gray-50);
}

.form-field:hover .field-icon {
    color: var(--primary-color);
    transform: scale(1.05);
    transition: all var(--transition-fast);
}

/* ==========================================================================
   DARK MODE SUPPORT (Futuro)
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    .bagsgo-search-box {
        --white: #1D2939;
        --gray-50: #101828;
        --gray-100: #1D2939;
        --gray-800: #F9FAFB;
        --gray-700: #EAECF0;
        --border-color: #344054;
    }
}

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

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

/* Smooth scrolling para la página completa */
html {
    scroll-behavior: smooth;
}

/* Mejora de performance para animaciones */
.bagsgo-search-box,
.form-field,
.quick-submit-btn,
.price-estimator {
    will-change: transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

/* ==========================================================================
   SPINNER ELEGANTE PARA PRECIO CALCULANDO
   ========================================================================== */

.price-value.calculating {
    color: #667eea;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.price-value.calculating::before {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 1.5px solid rgba(102, 126, 234, 0.2);
    border-top: 1.5px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 6px;
    vertical-align: middle;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Transición suave cuando aparece/desaparece */
.price-value {
    transition: all 0.3s ease;
}