.regex-input-box {
    background-color: var(--color-light-gray);
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-lg);
}

[data-theme="dark"] .regex-input-box {
    background-color: rgba(255, 255, 255, 0.05);
}

.pattern-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
    margin-bottom: 10px;
}

.slash {
    font-size: 1.5rem;
    font-weight: bold;
    color: #888;
    font-family: monospace;
}

#regex-pattern {
    flex: 1;
    font-family: "Courier New", Courier, monospace;
    font-size: 1.1rem;
    padding: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-white);
    color: var(--color-text);
}

[data-theme="dark"] #regex-pattern {
    background-color: #2a2a2a;
}

.flags-row {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.flag-label {
    cursor: pointer;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.error-msg {
    color: #d32f2f;
    background-color: #ffebee;
    padding: 0.5rem;
    border-radius: 4px;
    margin-top: 10px;
    font-family: monospace;
    font-size: 0.9rem;
}

[data-theme="dark"] .error-msg {
    background-color: rgba(211, 47, 47, 0.2);
    color: #ff8a80;
}

.tester-layout {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

@media (min-width: 800px) {
    .tester-layout {
        flex-direction: row;
        align-items: stretch;
    }
}

.editor-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.editor-col label {
    font-weight: bold;
    color: var(--color-text);
}

#test-string, .highlight-box {
    width: 100%;
    min-height: 250px;
    padding: var(--spacing-md);
    font-size: 1.05rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-white);
    color: var(--color-text);
    font-family: inherit;
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
}

[data-theme="dark"] #test-string, [data-theme="dark"] .highlight-box {
    background-color: var(--color-light-gray);
}

.highlight-box mark {
    background-color: #ffeb3b;
    color: #000;
    border-radius: 3px;
    padding: 0 2px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}