/* ====================================
   Variables CSS - Sistema de Diseño
   ==================================== */
:root {
    /* Colores primarios - Institucional Tlalpan */
    --primary: #8B1538;
    --primary-dark: #6B0F2A;
    --primary-light: #A62F51;
    
    /* Colores secundarios */
    --secondary: #1E3A5F;
    --secondary-light: #2C5282;
    
    /* Colores de acento */
    --accent: #D4AF37;
    --accent-light: #F4D03F;
    
    /* Grises */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Colores de estado */
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #3B82F6;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Bordes */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    /* 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transiciones */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ====================================
   Reset y Tipografía Base
   ==================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #F9FAFB 0%, #E5E7EB 100%);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Archivo', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

/* ====================================
   Decoración de Fondo
   ==================================== */
.background-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.06;
    animation: float 20s ease-in-out infinite;
}

.circle-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    top: -300px;
    right: -200px;
    animation-delay: 0s;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary-light) 100%);
    bottom: -150px;
    left: -100px;
    animation-delay: 5s;
}

.circle-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--info) 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.05);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(20px, 30px) scale(1.02);
    }
}

/* ====================================
   Header
   ==================================== */
.header-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--gray-200);
    animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.brand-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.brand-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin: 0;
    letter-spacing: -0.5px;
}

.brand-subtitle {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin: 0;
    font-weight: 500;
}

.security-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.badge-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--gray-100);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    color: var(--gray-700);
    font-weight: 500;
    border: 1px solid var(--gray-200);
}

.badge-item i {
    color: var(--success);
    font-size: 1.125rem;
}

/* ====================================
   Contenedor Principal
   ==================================== */
.main-container {
    padding: var(--spacing-xl) 0;
    min-height: calc(100vh - 200px);
}

.environment-alert {
    border-left: 4px solid var(--warning);
    background: rgba(245, 158, 11, 0.1);
    border-radius: var(--border-radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: var(--spacing-lg);
    animation: slideInDown 0.5s ease-out;
}

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

/* ====================================
   Tarjeta de Pago Principal
   ==================================== */
.payment-card {
    background: white;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease-out;
    border: 1px solid var(--gray-200);
}

@keyframes fadeInUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.card-header-custom {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: var(--spacing-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.card-header-custom::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.icon-container {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    border: 3px solid rgba(255, 255, 255, 0.3);
}

.icon-container i {
    font-size: 2.5rem;
    color: white;
}

.payment-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -1px;
	color: #fff;
}

.payment-description {
    font-size: 1rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ====================================
   Formulario
   ==================================== */
.payment-form {
    padding: var(--spacing-xl);
}

.form-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--gray-100);
}

.form-section:last-of-type {
    border-bottom: none;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
}

.form-control,
.form-select {
    border: 2px solid var(--gray-200);
    width: 85%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: all var(--transition-base);
    background: white;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(139, 21, 56, 0.1);
    outline: none;
}

.input-group-text {
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-right: none;
    color: var(--gray-600);
    font-size: 1.125rem;
}

.input-group .form-control,
.input-group .form-select {
    border-left: none;
}

.input-group:focus-within .input-group-text {
    border-color: var(--primary);
    background: rgba(139, 21, 56, 0.05);
    color: var(--primary);
}

/* ====================================
   Display de Monto
   ==================================== */
.amount-display {
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    border: 3px solid var(--primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.amount-display:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.currency-symbol {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-600);
}

.amount-value {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
    font-family: 'Archivo', sans-serif;
    letter-spacing: -2px;
}

.currency-code {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-500);
    align-self: flex-end;
    margin-bottom: 0.5rem;
}

.amount-details {
    background: var(--gray-50);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.9375rem;
}

.detail-row:last-child {
    border-bottom: none;
}

.total-row {
    font-size: 1.125rem;
    color: var(--primary);
    margin-top: 0.5rem;
    padding-top: 1rem;
    border-top: 2px solid var(--gray-300);
}

/* ====================================
   Botones de Acción
   ==================================== */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.form-actions .btn {
    flex: 1;
    padding: 1rem 2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    color: white;
    box-shadow: 0 4px 6px rgba(139, 21, 56, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 12px rgba(139, 21, 56, 0.4);
}

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

.btn-secondary {
    background: white;
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-loader {
    display: none;
}

.btn.loading .btn-text {
    display: none;
}

.btn.loading .btn-loader {
    display: inline-flex;
    align-items: center;
}

/* ====================================
   Tarjetas de Información
   ==================================== */
.info-cards {
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out;
}

.info-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
    height: 100%;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.info-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.info-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.info-card p {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin: 0;
}

/* ====================================
   Métodos de Pago
   ==================================== */
.payment-methods {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    animation: fadeInUp 1s ease-out;
}

.payment-methods h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--gray-900);
}

.methods-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.method-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    transition: all var(--transition-fast);
}

.method-badge:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: scale(1.05);
}

.method-badge i {
    font-size: 1.25rem;
}

/* ====================================
   Footer
   ==================================== */
.footer-section {
    background: white;
    border-top: 1px solid var(--gray-200);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
}

.footer-section p {
    color: var(--gray-600);
    font-size: 0.875rem;
}

.footer-section a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.footer-section a:hover {
    text-decoration: underline;
}

/* ====================================
   Modales
   ==================================== */
.modal-content {
    border-radius: var(--border-radius-lg);
    border: none;
    box-shadow: var(--shadow-2xl);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border-bottom: none;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

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

.modal-body h6 {
    color: var(--primary);
    font-weight: 700;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.modal-body h6:first-child {
    margin-top: 0;
}

/* ====================================
   Checkbox Personalizado
   ==================================== */
.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--gray-300);
    border-radius: 0.25rem;
    transition: all var(--transition-fast);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check-label {
    font-size: 0.9375rem;
    color: var(--gray-700);
}

.form-check-label a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

.form-check-label a:hover {
    text-decoration: underline;
}

/* ====================================
   Validación de Formularios
   ==================================== */
.was-validated .form-control:invalid,
.was-validated .form-select:invalid {
    border-color: var(--danger);
}

.was-validated .form-control:valid,
.was-validated .form-select:valid {
    border-color: var(--success);
}

.invalid-feedback {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ====================================
   Responsive Design
   ==================================== */
@media (max-width: 768px) {
    .header-section {
        padding: var(--spacing-sm) 0;
    }
    
    .brand-logo {
        width: 50px;
        height: 50px;
    }
    
    .brand-title {
        font-size: 1.25rem;
    }
    
    .brand-subtitle {
        font-size: 0.75rem;
    }
    
    .security-badges {
        justify-content: flex-start;
        margin-top: var(--spacing-sm);
    }
    
    .badge-item {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
    }
    
    .payment-title {
        font-size: 1.5rem;
    }
    
    .payment-description {
        font-size: 0.875rem;
    }
    
    .payment-form {
        padding: var(--spacing-md);
    }
    
    .amount-value {
        font-size: 2rem;
    }
    
    .currency-symbol {
        font-size: 1.5rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    .methods-container {
        gap: 0.5rem;
    }
    
    .method-badge {
        font-size: 0.75rem;
        padding: 0.5rem 0.75rem;
    }
}

@media (max-width: 576px) {
    .main-container {
        padding: var(--spacing-md) 0;
    }
    
    .payment-card {
        border-radius: var(--border-radius-md);
    }
    
    .card-header-custom {
        padding: var(--spacing-md);
    }
    
    .icon-container {
        width: 60px;
        height: 60px;
    }
    
    .icon-container i {
        font-size: 2rem;
    }
}

/* ====================================
   Animaciones de Loading
   ==================================== */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.spinner-border {
    animation: spin 0.75s linear infinite;
}

/* ====================================
   Utilidades
   ==================================== */
.text-muted {
    color: var(--gray-500) !important;
}

.text-danger {
    color: var(--danger) !important;
}

.text-success {
    color: var(--success) !important;
}

.text-primary {
    color: var(--primary) !important;
}


/* borde error */
.is-invalid {
    border: 2px solid #dc3545 !important;
    background-color: #fff5f5;
}

/* borde válido */
.is-valid {
    border: 2px solid #198754 !important;
}

/* mensaje error */
.invalid-feedback-custom {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 8px 10px;

    font-size: 14px;
    font-weight: 500;

    color: #842029;
    background-color: #f8d7da;
    border-radius: 6px;
}

/* icono opcional */
.invalid-feedback-custom::before {
    content: "⚠ ";
    font-weight: bold;
}

/* espaciado entre grupos */
.form-group {
    margin-bottom: 18px;
}