.regex-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

@media (max-width: 768px) {
    .regex-container {
        grid-template-columns: 1fr;
    }
}

.regex-input-section,
.regex-output-section {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

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

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.regex-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: border-color 0.3s ease;
}

.regex-input-wrapper:focus-within {
    border-color: var(--primary-color);
}

.regex-delimiter {
    padding: 0 12px;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    font-size: 18px;
    font-weight: bold;
}

.regex-input {
    flex: 1;
    padding: 12px 8px;
    border: none;
    background: transparent;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: var(--text-primary);
    outline: none;
}

.test-textarea {
    width: 100%;
    min-height: 200px;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--input-bg);
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: var(--text-primary);
    resize: vertical;
    transition: border-color 0.3s ease;
}

.test-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.flags-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.flags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.flag-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: var(--input-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
}

.flag-checkbox:hover {
    border-color: var(--primary-color);
    background: var(--primary-color-light);
}

.flag-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.flag-checkbox span:first-of-type {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    color: var(--primary-color);
}

.flag-checkbox .flag-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.replace-section {
    margin-top: 20px;
    padding: 15px;
    background: var(--input-bg);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.replace-input {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--card-bg);
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.replace-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.tabs {
    display: flex;
    gap: 5px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 20px;
}

.tab-btn {
    padding: 10px 20px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: var(--primary-color);
    background: var(--input-bg);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    min-height: 300px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.result-info {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
    padding: 10px;
    background: var(--input-bg);
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
}

.result-container {
    min-height: 250px;
    max-height: 400px;
    overflow-y: auto;
    padding: 15px;
    background: var(--input-bg);
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.6;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.match-item {
    padding: 10px;
    margin-bottom: 10px;
    background: var(--card-bg);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--border-radius-sm);
}

.match-item:hover {
    background: var(--primary-color-light);
}

.match-index {
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.match-text {
    color: var(--text-primary);
    word-break: break-all;
}

.match-position {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 5px;
}

.highlight {
    background: var(--primary-color-light);
    color: var(--primary-color);
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: bold;
}

.group-item {
    padding: 10px;
    margin-bottom: 10px;
    background: var(--card-bg);
    border-radius: var(--border-radius-sm);
}

.group-name {
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.group-value {
    color: var(--text-primary);
    word-break: break-all;
}

.quick-regex-section {
    margin-top: 40px;
    padding: 25px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.quick-regex-section h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.regex-category {
    margin-bottom: 25px;
}

.regex-category:last-child {
    margin-bottom: 0;
}

.regex-category h4 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    padding-left: 8px;
    border-left: 3px solid var(--primary-color);
}

.quick-regex-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
}

.quick-regex-btn {
    padding: 12px 16px;
    background: var(--input-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

.quick-regex-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.help-section {
    margin-top: 40px;
    padding: 25px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.help-section h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.help-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.help-item h4 {
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 16px;
}

.help-item ul {
    list-style: none;
    padding: 0;
}

.help-item li {
    padding: 6px 0;
    color: var(--text-secondary);
    font-size: 13px;
    border-bottom: 1px solid var(--border-color-light);
}

.help-item li:last-child {
    border-bottom: none;
}

.help-item code {
    background: var(--input-bg);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
    font-weight: bold;
}

.error-message {
    color: var(--error-color);
    padding: 15px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--error-color);
}

.success-message {
    color: var(--success-color);
    padding: 15px;
    background: rgba(34, 197, 94, 0.1);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--success-color);
}

@media (max-width: 768px) {
    .flags-container {
        gap: 8px;
    }

    .flag-checkbox {
        flex: 1 1 calc(50% - 8px);
    }

    .quick-regex-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .help-content {
        grid-template-columns: 1fr;
    }
}
.language-select {

    padding: 4px 8px;

    border: 1px solid var(--border-color);

    border-radius: var(--border-radius-sm);

    background: var(--card-bg);

    color: var(--text-primary);

    font-size: 13px;

    outline: none;

    cursor: pointer;

}



.language-select:focus {

    border-color: var(--primary-color);

}



.btn-sm {

    padding: 4px 10px;

    font-size: 12px;

}



.code-container pre {

    margin: 0;

    white-space: pre-wrap;

    word-break: break-all;

}