:root {
    --primary-color: #5e72e4;
    --secondary-color: #eef2f5;
    --accent-color: #ff9d00;
    --text-color: #2d3748;
    --light-gray: #e2e8f0;
    --dark-gray: #4a5568;
    --success-color: #38b2ac;
    --error-color: #e53e3e;
    --border-radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f8f9fa;
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 20px;
    overflow: hidden;
}

.container {
    width: 100%;
    max-width: 480px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.header {
    background: linear-gradient(180deg, var(--primary-color), #7795f8);
    color: white;
    padding: 20px 20px 40px 20px;
    text-align: center;
    position: relative;
}

.header:after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 0;
    right: 0;
    height: 40px;
    background: white;
    border-radius: 50% 50% 0 0;
}

.header h1 {
    margin-bottom: 10px;
    font-size: 28px;
    font-weight: 700;
}

.header p {
    font-size: 16px;
    opacity: 0.9;
}

.content {
    padding: 30px;
}

.product-info {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
    border-radius: var(--border-radius);
}

.product-icon {
    background-color: var(--primary-color);
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 15px;
    color: white;
    font-size: 20px;
}

.product-details {
    flex: 1;
}

.product-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.product-access {
    font-size: 14px;
    color: var(--dark-gray);
}

.product-price {
    font-weight: 700;
    font-size: 20px;
    color: var(--primary-color);
}

.old-price {
    text-decoration: line-through;
    color: var(--dark-gray);
    font-size: 16px;
    margin-right: 8px;
    font-weight: normal;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-gray);
}

.input-field {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
    outline: none;
}

.input-field:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(94, 114, 228, 0.1);
}

.promo-container {
    display: flex;
    align-items: stretch;
}

.promo-container .input-field {
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.apply-btn {
    padding: 14px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.apply-btn:hover {
    background-color: #4c61c9;
}

.payment-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 30px;
}

.payment-btn {
    padding: 16px;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.payment-btn svg {
    margin-right: 8px;
}

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

.ru-payment:hover {
    background-color: #4c61c9;
}

.international-payment {
    background-color: white;
    color: var(--text-color);
    border: 1px solid var(--primary-color);
}

.international-payment:hover {
    background-color: var(--secondary-color);
}

.promo-status {
    margin-top: 10px;
    font-size: 14px;
    display: none;
}

.promo-success {
    color: var(--success-color);
}

.promo-error {
    color: var(--error-color);
}

.pulse {
    animation: pulse 0.4s;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Стили для индикатора загрузки */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-spinner {
    text-align: center;
}

.loading-spinner svg {
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

.loading-spinner p {
    color: var(--primary-color);
    font-weight: 500;
}

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

/* Telegram WebApp specific styles */
@media (max-width: 480px) {
    .container {
        border-radius: 0;
        box-shadow: none;
        height: 100%;
    }
    
    body {
        padding: 0;
    }
}