/* CSS Variables */
:root {
    --primary-bg: #1a1a1a;
    --secondary-bg: #2c2c2c;
    --text-color: #ffffff;
    --secondary-text: #b0b0b0;
    --accent-color: #00b7ff;
    --warning-bg: #ff4d4d;
    --success-bg: #28a745;
    --error-bg: #ff3333;
    --border-radius: 12px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Loading Indicator */
#btcpay-loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--primary-bg);
    color: var(--text-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    z-index: 10001;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
}

/* Modal */
#btcpay-popup-modal, #btcpay-error-popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10000;
}

/* Modal Content */
#btcpay-popup-content, #btcpay-error-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--primary-bg);
    color: var(--text-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 720px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

/* Error Popup Specific */
#btcpay-error-content {
    max-width: 500px;
    text-align: center;
}
#btcpay-error-content h1 {
    font-size: 24px;
    margin: 0 0 var(--spacing-md);
}
#btcpay-error-content p {
    font-size: 16px;
    margin: 0 0 var(--spacing-md);
}
.btcpay-error-close {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-color);
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
}
.btcpay-error-close:hover,
.btcpay-error-close:focus {
    background: #0099cc;
    outline: 2px solid var(--accent-color);
}

/* Responsive Design */
@media (max-width: 600px) {
    #btcpay-popup-content, #btcpay-error-content, #btcpay-loading {
        width: 92vw;
        max-width: 92vw;
    }
}
@media (min-width: 601px) and (max-width: 1024px) {
    #btcpay-popup-content {
        max-width: 640px;
    }
}

/* Header */
.btcpay-modal-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}
.btcpay-modal-header h1 {
    font-size: 28px;
    margin: 0 0 var(--spacing-sm);
}
.btcpay-order-number {
    font-size: 16px;
    color: var(--secondary-text);
}
.btcpay-details-toggle {
    background: none;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    font-size: 14px;
    margin-top: var(--spacing-sm);
}
.btcpay-details-toggle:hover,
.btcpay-details-toggle:focus {
    text-decoration: underline;
    outline: 2px solid var(--accent-color);
}

/* Details Content (Status, Sums, and Address) */
.btcpay-details-content {
    margin-bottom: var(--spacing-md);
}
.btcpay-status-chip {
    padding: var(--spacing-md);
    text-align: center;
    border-radius: var(--border-radius);
    font-size: 15px;
}
.btcpay-status-waiting.loading::before {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-right: var(--spacing-sm);
    border: 2px solid var(--text-color);
    border-top: 2px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
.btcpay-error-icon {
    font-size: 18px;
    vertical-align: middle;
}
.btcpay-countdown {
    font-size: 14px;
    margin-left: var(--spacing-sm);
}
.btcpay-payment-details {
    margin: var(--spacing-sm) 0;
}
.btcpay-amount {
    font-size: 16px;
    margin: var(--spacing-sm) 0;
}
.btcpay-amount span {
    font-weight: 600;
    color: var(--success-bg);
}
.btcpay-address {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: monospace;
    font-size: 14px;
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}
.btcpay-address-text {
    flex-grow: 1;
    word-break: break-all;
}
.btcpay-copy-address, .btcpay-copy-btc, .btcpay-copy-btc-amount {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-color);
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
}
.btcpay-copy-address:disabled, .btcpay-copy-btc:disabled, .btcpay-copy-btc-amount:disabled {
    background: #6c757d;
    cursor: not-allowed;
}
.btcpay-copy-address:hover:not(:disabled),
.btcpay-copy-btc:hover:not(:disabled),
.btcpay-copy-btc-amount:hover:not(:disabled) {
    background: #0099cc;
}
.btcpay-copy-address:focus,
.btcpay-copy-btc:focus,
.btcpay-copy-btc-amount:focus {
    outline: 2px solid var(--accent-color);
}
.btcpay-copy-feedback {
    font-size: 12px;
    color: var(--success-bg);
    margin-left: var(--spacing-sm);
    display: none;
}
.btcpay-copy-error {
    font-size: 12px;
    color: var(--error-bg);
    margin-left: var(--spacing-sm);
    display: none;
}

/* Intro */
.btcpay-intro {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

/* Warning */
.btcpay-warning {
    background: var(--warning-bg);
    color: var(--text-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    font-size: 15px;
    line-height: 1.5;
}

/* Select Option Message */
.btcpay-select-option-message {
    font-size: 15px;
    color: var(--secondary-text);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

/* Accordion */
.btcpay-accordion .accordion-item {
    margin-bottom: var(--spacing-sm);
    border: 1px solid var(--secondary-bg);
    border-radius: var(--border-radius);
}
.btcpay-accordion .accordion-item-header {
    padding: var(--spacing-md);
    background: var(--secondary-bg);
    cursor: pointer;
    font-size: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.btcpay-accordion .accordion-item-header:hover {
    background: #3a3a3a;
}
.btcpay-accordion .accordion-item-content {
    padding: var(--spacing-md);
    background: var(--primary-bg);
    display: none;
}
.btcpay-accordion .accordion-item-content.active {
    display: block;
}
.btcpay-accordion .accordion-item-content .description {
    margin: var(--spacing-sm) 0;
    font-size: 15px;
    color: var(--text-color);
    line-height: 1.5;
}
.btcpay-accordion .accordion-item-content .fee {
    font-weight: 500;
    color: var(--warning-bg);
    margin: var(--spacing-sm) 0;
}
.btcpay-accordion .accordion-item-content .adjusted-amount {
    font-weight: 600;
    color: var(--success-bg);
    margin: var(--spacing-sm) 0;
}
.btcpay-accordion .accordion-item-content .adjusted-btc-amount {
    font-weight: 600;
    color: var(--success-bg);
    margin: var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.btcpay-accordion .accordion-item-content a {
    color: var(--accent-color);
    text-decoration: none;
}
.btcpay-accordion .accordion-item-content a:hover,
.btcpay-accordion .accordion-item-content a:focus {
    text-decoration: underline;
    outline: 2px solid var(--accent-color);
}
.btcpay-badge {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    margin-left: var(--spacing-sm);
    background: #ffd700;
    color: #000;
}
.flag-icon {
    width: 24px;
    height: 16px;
    margin-right: var(--spacing-sm);
    background-size: cover;
    display: inline-block;
    vertical-align: middle;
}

/* Footer */
.btcpay-modal-footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}
.btcpay-language-select {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    background: var(--secondary-bg);
    color: var(--text-color);
}
.btcpay-close-modal {
    padding: var(--spacing-sm) var(--spacing-md);
    background: #6c757d;
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
}
.btcpay-close-modal:hover,
.btcpay-close-modal:focus {
    background: #5a6268;
    outline: 2px solid var(--accent-color);
}

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

/* Admin Table */
.btcpay-settings-table {
    width: 100%;
    border-collapse: collapse;
}
.btcpay-settings-table th,
.btcpay-settings-table td {
    padding: var(--spacing-md);
    border: 1px solid #444;
    text-align: left;
}
.btcpay-settings-table th {
    background: var(--secondary-bg);
    color: var(--text-color);
    font-weight: bold;
}
.btcpay-settings-table textarea,
.btcpay-settings-table input[type="text"],
.btcpay-settings-table input[type="number"],
.btcpay-settings-table input[type="url"],
.btcpay-settings-table input[type="color"] {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--secondary-bg);
    color: var(--text-color);
    border: 1px solid #444;
    border-radius: var(--border-radius);
}
.btcpay-settings-table .button {
    background: var(--accent-color);
    color: var(--text-color);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
}
.btcpay-settings-table .button:hover,
.btcpay-settings-table .button:focus {
    background: #0099cc;
    outline: 2px solid var(--accent-color);
}