:root {
    --primary-color: #0055ff; /* Azul Movistar Argentina */
    --secondary-color: #2563EB;
    --background-color: #F8F9FA;
    --text-color: #212529;
    --border-color: #DEE2E6;
    --success-color: #28A745;
    --light-gray: #e9ecef;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
.main-header {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-header .content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s;
}

.main-nav a:hover, .main-nav a.active {
    background-color: var(--primary-color);
    color: white;
}

/* Main Content */
.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

.recharge-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.recharge-header {
    text-align: center;
    margin-bottom: 2rem;
}

.recharge-header h1 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.recharge-header p {
    color: #6c757d;
}

/* Step Content */
.step-content {
    display: none;
}

.step-content.active {
    display: block;
    animation: fadeIn 0.5s;
}

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

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 85, 255, 0.1);
}

.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn:disabled {
    background-color: var(--light-gray);
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: #0044cc;
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: #CED4DA;
}

/* Amount Selection */
.amount-selection h3 {
    margin-bottom: 1rem;
    text-align: center;
}

.amount-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.amount-option {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.amount-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.amount-option.selected {
    border-color: var(--primary-color);
    background-color: rgba(0, 85, 255, 0.1);
}

.amount-option .price {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.amount-option .bonus {
    display: block;
    font-size: 0.9rem;
    color: var(--success-color);
}

/* Payment Summary */
.payment-summary {
    background-color: var(--light-gray);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.payment-summary h3 {
    margin-bottom: 0.5rem;
}

.payment-summary p {
    margin: 0.25rem 0;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

/* Loading Screen */
.loading-screen {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 3rem;
}

.loading-screen.active {
    display: flex;
    animation: fadeIn 0.5s;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: var(--primary-color);
    animation: spin 1s ease infinite;
    margin-bottom: 1rem;
}

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

/* Footer Styles */
.main-footer {
    background-color: #1A1A2E;
    color: white;
    padding: 3rem 0;
    margin-top: 3rem;
}

.main-footer .content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-logo img {
    height: 30px;
    margin-bottom: 1rem;
}

.footer-links h3 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links a {
    color: #ADB5BD;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #2C2C3E;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.legal-links a {
    color: #ADB5BD;
    text-decoration: none;
    margin-left: 1.5rem;
}

.legal-links a:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .main-header .content {
        flex-direction: column;
        gap: 1rem;
    }

    .main-nav ul {
        gap: 1rem;
    }

    .recharge-container {
        padding: 1.5rem;
    }
    
    .amount-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
    
    .form-row {
        flex-direction: column;
    }
}