/* Overlay */
.payment-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9998;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Popup */
.payment-popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
    z-index: 9999;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s;
}

@keyframes slideIn {
    from {
        transform: translate(-50%, -60%);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%);
        opacity: 1;
    }
}

.popup-header {
    padding: 25px;
    border-bottom: 1px solid #eee;
    position: relative;
}

.popup-header h2 {
    margin: 0;
    color: #333;
    font-size: 24px;
}

.close-popup {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 30px;
    height: 30px;
    border: none;
    background: #f5f5f5;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    line-height: 1;
    transition: background 0.3s;
}

.close-popup:hover {
    background: #e0e0e0;
}

.popup-body {
    padding: 25px;
}

.payment-plans {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.plan-card {
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.plan-card:hover {
    border-color: #4CAF50;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.2);
}

.plan-card.selected {
    border-color: #4CAF50;
    background: #f1f8f4;
}

.plan-card.best-value::after {
    content: 'Выгодно';
    position: absolute;
    top: -10px;
    right: 10px;
    background: #FF9800;
    color: white;
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: bold;
}

.plan-price {
    font-size: 28px;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.plan-tokens {
    color: #4CAF50;
    font-size: 18px;
    font-weight: bold;
}

.plan-label {
    color: #999;
    font-size: 12px;
    margin-top: 5px;
}

.pay-button {
    width: 100%;
    padding: 15px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
}

.pay-button:hover {
    background: #45a049;
}

.pay-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #4CAF50;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

.error-message {
    display: none;
    background: #ffebee;
    color: #c62828;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 15px;
}