body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
}

.container {
    width: 800px;
    margin: 40px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
}

h1 {
    text-align: center;
}

.row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

label {
    margin-right: 5px;
}
.editor {
    display: flex;
    height: 220px;
    border: 1px solid #ccc;
    font-family: monospace;
    font-size: 14px;
    overflow: hidden;   /* 🔥 THIS FIXES OVERFLOW */
}

#lineNumbers {
    width: 45px;
    padding: 10px 5px;
    text-align: right;
    background: #f0f0f0;
    color: #666;
    line-height: 20px;
    white-space: pre;
    overflow: hidden;   /* 🔥 LOCK LINE NUMBERS */
    user-select: none;
}

#inputCode {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    padding: 10px;
    line-height: 20px;  /* 🔥 MUST MATCH lineNumbers */
    font-family: monospace;
    font-size: 14px;
    overflow-y: auto;
}

/* ===== EDITOR ===== */

/*.editor {
    display: flex;
    border: 1px solid #ccc;
    height: 200px;
    font-family: monospace;
}

#lineNumbers {
    background: #f0f0f0;
    padding: 10px 6px;
    text-align: right;
    color: #666;
    user-select: none;
    line-height: 20px;
    min-width: 40px;
}

#inputCode {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    padding: 10px;
    font-family: monospace;
    font-size: 14px;
    line-height: 20px;
    white-space: pre;
    overflow-wrap: normal;
    overflow-x: auto;
}

/* ===== BUTTON & OUTPUT ===== */

button {
    width: 100%;
    margin: 15px 0;
    padding: 10px;
    font-size: 16px;
    cursor: pointer;
}

#outputCode {
    width: 100%;
    height: 180px;
    font-family: monospace;
    font-size: 14px;
}