/* Payment Modal Styles */
.payment-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    /* Start from top to allow scrolling */
    padding: 2rem 0;
    z-index: 1000;
    backdrop-filter: blur(8px);
    overflow-y: auto;
    /* Enable scrolling on the overlay */
}

/* Background lock */
body.modal-open {
    overflow: hidden;
    height: 100vh;
}

.payment-modal.hidden {
    display: none;
}

.payment-modal-content {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2.5rem;
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    position: relative;
    margin: auto;
    /* Center horizontally and allow vertical centering if content is small */
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.payment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.payment-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    line-height: 1;
}

.close-modal:hover {
    color: var(--danger-color);
}

.payment-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.payment-card {
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
}

.payment-card:hover {
    border-color: var(--primary-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.payment-card.selected {
    border-color: var(--success-color);
    background: linear-gradient(135deg, rgba(0, 255, 100, 0.1), rgba(0, 200, 100, 0.1));
}

.card-icon {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
}

.card-name {
    font-weight: 600;
    color: var(--text-primary);
}

.card-details {
    margin-top: 2rem;
}

.card-details.hidden {
    display: none;
}

.card-instruction {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.card-number-box {
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.card-number {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-accent);
    font-family: 'Courier New', monospace;
}

.copy-btn {
    background: linear-gradient(135deg, var(--primary-accent), hsl(45, 100%, 45%));
    color: var(--primary-bg);
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.copy-btn:hover {
    transform: scale(1.05);
}

.copy-btn:active {
    transform: scale(0.95);
}

.payment-amount {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.payment-amount span {
    color: var(--primary-accent);
}

.confirm-payment-btn {
    background: linear-gradient(135deg, var(--success-color), hsl(140, 70%, 40%));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-normal);
    width: 100%;
}

.confirm-payment-btn:disabled {
    background: var(--secondary-bg);
    color: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    border: 1px solid var(--border-color);
}

/* Upload Zone Styles */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 2rem 1rem;
    text-align: center;
    margin-bottom: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    background: rgba(255, 255, 255, 0.02);
}

.upload-zone:hover,
.upload-zone.dragging {
    border-color: var(--primary-accent);
    background: rgba(255, 193, 7, 0.05);
}

.upload-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 1rem;
}

.upload-text {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.screenshot-preview {
    position: absolute;
    inset: 0;
    background: var(--secondary-bg);
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screenshot-preview.hidden {
    display: none;
}

#preview-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.remove-screenshot {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 0, 0, 0.8);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    line-height: 24px;
    cursor: pointer;
    font-weight: bold;
    transition: var(--transition-fast);
}

.remove-screenshot:hover {
    background: var(--danger-color);
    transform: scale(1.1);
}

.processing-payment {
    text-align: center;
    padding: 2rem 0;
}

.processing-payment.hidden {
    display: none;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.processing-text {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.processing-subtext {
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .payment-modal-content {
        padding: 1.5rem;
        width: 95%;
    }

    .payment-title {
        font-size: 1.25rem;
    }

    .payment-cards {
        gap: 0.75rem;
    }

    .payment-card {
        padding: 1rem;
    }

    .card-number {
        font-size: 1rem;
    }

    .upload-zone {
        padding: 1.5rem 0.5rem;
    }

    .upload-icon {
        font-size: 2rem;
    }

    .upload-text {
        font-size: 0.9rem;
    }
}